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Patent US5228056A successfully refreshed from Google Patents.
US5228056A
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US
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Synchronous spread-spectrum communications system and method
Assignee: InterDigital Technology Corp
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Filing: 1990-12-14
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Granted: 1993-07-13
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Expires: 2010-12-14
Abstract
Abstract A spread spectrum communications system for use over a communications channel, including a transmitter-generic-chip-code generator, a transmitter-message-chip-code generator, an EXCLUSIVE-OR gate, a combiner, a transmitter, a receiver-generic-chip-code generator, a receiver-generic mixer, a generic-bandpass filter, a receiver-message-chip-code generator, a receiver-message mixer, a message-bandpass filter, and a synchronous detector. The transmitter-generic-chip-code generator generates a generic-chip-code signal and the transmitter-message-chip-code generator generates a message-chip-code signal. The EXCLUSIVE-OR gate spread-spectrum processes message data with the message-chip-code signal to generate a spread-spectrum signal. The combiner combines the generic-chip-code signal with the spread-spectrum-processed signal. The transmitter transmits the combined generic-chip-code signal and spread-spectrum signal, on a carrier signal over the communications channel as a spread-spectrum-communications signal. The receiver-generic-chip-code generator generates a replica of the generic-chip-code signal. The generic mixer recovers the carrier signal from the spread-spectrum-communications signal. The receiver-message-chip-code generator generates a replica of the message-chip-code signal. The receiver-message mixer despreads the spread-spectrum-communications signal as a modulated-data signal. The tracking and acquisition circuit uses the recovered carrier signal for synchronizing the replicas of the generic-chip-code signal to the recovered carrier signal. The synchronous detector synchronously demodulates the modulated-data signal as received data.
Inventors
- 👤 Donald L. Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/343; G; G01; G01S; G01S13/00; G01S13/74; G01S13/82; G01S5/00; G01S5/0009; G01S5/0018; G01S5/0036; G01S5/02; G01S5/14; H04B; H04B1/00; H04B1/69; H04B1/707; H04J; H04J13/00; H04W52/346; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18545; H04B7/18547
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
305 words
A spread spectrum communications system for use over a communications channel, comprising: a transmitter-generic-chip-code generator for generating a generic-chip-code signal; a transmitter-message-chip-code generator for generating a message-chip-code signal; an EXCLUSIVE-OR gate coupled to said transmitter-message-chip-code generator for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; a combiner coupled to said transmitter-generic-chip-code generator and said EXCLUSIVE-OR gate for combining the generic-chip-code signal with the spread-spectrum-processed signal; a transmitter coupled to said combiner for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal, on a carrier signal over said communications channel as a spread-spectrum-communications signal; a receiver-generic-chip-code generator for generating a replica of the generic-chip-code signal; a generic mixer coupled to said receiver-generic-chip-code generator for recovering the carrier signal from the spread-spectrum-communications signal; a receiver-message-chip-code generator coupled to said receiver-generic-chip-code generator and synchronized to the replica of the generic-chip-code signal for generating a replica of the message-chip-code signal; a message mixer coupled to said receiver-message-chip-code generator and responsive to the replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as a modulated-data signal; a message-bandpass filter coupled to said message mixer for filtering the modulated-data signal; a generic-bandpass filter coupled to said generic mixer for filtering the recovered-carrier signal recovered from the spread-spectrum-communications signal; a tracking and acquisition circuit coupled to an output of said generic-bandpass filter and to said receiver-generic-chip-code generator, said tracking and acquisition circuit responsive to acquiring and tracking the recovered-carrier signal for synchronizing the generic-chip-code signal to the recovered-carrier signal; a power splitter coupled between said communications channel, said generic mixer and said message mixer for dividing the spread-spectrum-communications signal between said generic mixer and said message mixer; and a synchronous detector coupled to said message-bandpass filter, responsive to the recovered carrier signal recovered by the generic-mixer device for synchronously demodulating the modulated-data signal as a detected signal.
Claim 2
Dependent Claim
305 words
A spread spectrum communications system for use over a communications channel, comprising: a transmitter-generic-chip-code generator for generating a generic-chip-code signal; a transmitter-message-chip-code generator for generating a message-chip-code signal; an EXCLUSIVE-OR gate coupled to said transmitter-message-chip-code generator for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; a combiner coupled to said transmitter-generic-chip-code generator and said EXCLUSIVE-OR gate for combining the generic-chip-code signal with the spread-spectrum-processed signal; a transmitter coupled to said combiner for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal, on a carrier signal over said communications channel as a spread-spectrum-communications signal; a receiver-generic-chip-code generator for generating a replica of the generic-chip-code signal; a generic mixer coupled to said receiver-generic-chip-code generator for recovering the carrier signal from the spread-spectrum-communications signal; a receiver-message-chip-code generator coupled to said receiver-generic-chip-code generator and synchronized to the replica of the generic-chip-code signal for generating a replica of the message-chip-code signal; a message mixer coupled to said receiver-message-chip-code generator and responsive to the replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as a modulated-data signal; a message-bandpass filter coupled to said message mixer for filtering the modulated-data signal; a generic-bandpass filter coupled to said generic mixer for filtering the recovered-carrier signal recovered from the spread-spectrum-communications signal; a tracking and acquisition circuit coupled to an output of said generic-bandpass filter and to said receiver-generic-chip-code generator, said tracking and acquisition circuit responsive to acquiring and tracking the recovered-carrier signal for synchronizing the generic-chip-code signal to the recovered-carrier signal; a power splitter coupled between said communications channel, said generic mixer and said message mixer for dividing the spread-spectrum-communications signal between said generic mixer and said message mixer; and a synchronous detector coupled to said message-bandpass filter, responsive to the recovered carrier signal recovered by the generic-mixer device for synchronously demodulating the modulated-data signal as a detected signal.
Claim 3
Dependent Claim
158 words
A spread spectrum communications system for use over a communications channel, comprising: generic means for generating a generic-chip-code signal; message means for generating a message-chip-code signal; spreading means for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; summer means for combining the generic-chip-code signal with the spread-spectrum-processed signal; means for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal, on a carrier signal over said communications channel as a spread-spectrum-communications signal; generic-spread-spectrum-processing means for recovering the carrier signal from the spread-spectrum-communications signal and for generating a replica of the generic-chip-code signal synchronized to the recovered-carrier signal; acquisition means responsive to acquiring and tracking the recovered-carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; message-spread-spectrum-processing means for despreading the spread-spectrum-communications signal as a modulated-data signal; detection means for detecting the modulated-data signal as a detected signal; and synchronous means responsive to the generic-chip-code signal for synchronously converting the detected signal to received data.
Claim 4
Dependent Claim
158 words
A spread spectrum communications system for use over a communications channel, comprising: generic means for generating a generic-chip-code signal; message means for generating a message-chip-code signal; spreading means for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; summer means for combining the generic-chip-code signal with the spread-spectrum-processed signal; means for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal, on a carrier signal over said communications channel as a spread-spectrum-communications signal; generic-spread-spectrum-processing means for recovering the carrier signal from the spread-spectrum-communications signal and for generating a replica of the generic-chip-code signal synchronized to the recovered-carrier signal; acquisition means responsive to acquiring and tracking the recovered-carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; message-spread-spectrum-processing means for despreading the spread-spectrum-communications signal as a modulated-data signal; detection means for detecting the modulated-data signal as a detected signal; and synchronous means responsive to the generic-chip-code signal for synchronously converting the detected signal to received data.
Claim 5
Dependent Claim
33 words
The spread spectrum communications system as set forth in claim 2 wherein said detection means includes a synchronous detector responsive to the recovered-carrier signal for converting the modulated-data signal to the detected signal.
Claim 6
Dependent Claim
34 words
The spread spectrum communications system as set forth in claim 2 wherein said message-spread-spectrum-processing means includes means for storing a replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as a modulated-data signal.
Claim 7
Dependent Claim
34 words
The spread spectrum communications system as set forth in claim 2 wherein said generic-spread-spectrum-processing means includes means for storing a replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as the recovered-carrier signal.
Claim 8
Dependent Claim
27 words
The spread spectrum communications system as set forth in claim 2 wherein detection means includes an envelope detector for converting the modulated-data signal to the detected signal.
Claim 9
Dependent Claim
32 words
The spread spectrum communications system as set forth in claim 5 wherein detection means includes a synchronous detector responsive to the recovered-carrier signal for converting the modulated-data signal to the detected signal.
Claim 10
Dependent Claim
58 words
The spread spectrum communications system as set forth in claim 2 wherein said synchronous means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive to the received data at an input to said lowpass filter for integrating and dumping said lowpass filter and said electronic switch.
Claim 11
Dependent Claim
61 words
The spread spectrum communications system as set forth in claim 2 wherein said synchronous means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive coupled to said generic-spread-spectrum-processing means and responsive to the replica of the generic-chip-code signal for integrating and dumping said lowpass filter and said electronic switch.
Claim 12
Independent Claim
132 words
A method for synchronously demodulating spread spectrum communications, comprising the steps of: generating a generic-chip-code signal; generating a message-chip-code signal; spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; combining the generic-chip-code signal with the spread-spectrum-processed signal; transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal; recovering, using a replica of the generic-chip-code signal, the carrier signal from the spread-spectrum-communications signal; acquiring and tracking the recovered-carrier signal; generating, synchronized to the recovered-carrier signal, the replica of the generic-chip-code signal; generating a replica of the message-chip-code signal synchronized to the replica of the generic-chip-code signal; despreading, using the replica of the message-chip-code signal, the spread-spectrum-communications signal as a modulated-data signal; and demodulating the modulated-data signal as received data.
Claim 13
Independent Claim
132 words
A method for synchronously demodulating spread spectrum communications, comprising the steps of: generating a generic-chip-code signal; generating a message-chip-code signal; spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; combining the generic-chip-code signal with the spread-spectrum-processed signal; transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal; recovering, using a replica of the generic-chip-code signal, the carrier signal from the spread-spectrum-communications signal; acquiring and tracking the recovered-carrier signal; generating, synchronized to the recovered-carrier signal, the replica of the generic-chip-code signal; generating a replica of the message-chip-code signal synchronized to the replica of the generic-chip-code signal; despreading, using the replica of the message-chip-code signal, the spread-spectrum-communications signal as a modulated-data signal; and demodulating the modulated-data signal as received data.
Claim 14
Dependent Claim
23 words
The method as set forth in claim 10 wherein the step of demodulating includes synchronously converting the modulated-data signal to the received data.
Claim 15
Dependent Claim
32 words
The method as set forth in claim 10 wherein the despreading step includes the step of storing a replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as a modulated-data signal.
Claim 16
Dependent Claim
33 words
The method as set forth in claim 10 wherein the recovering step includes the step of storing a replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as the recovered carrier signal.
Claim 17
Dependent Claim
26 words
The method as set forth in claim 10 wherein the demodulating step includes synchronously demodulating, using the recovered-carrier signal, the modulated-data signal as a detected signal.
Claim 18
Dependent Claim
60 words
A spread spectrum communications receiver comprising: generic-spread-spectrum-processing means for recovering a carrier signal from a spread-spectrum-communications signal; message-spread-spectrum-processing means for despreading a spread-spectrum-communications signal as a modulated-data signal; acquisition means responsive to acquiring and tracking the recovered-carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered carrier signal; and detection means for converting the modulated-data signal to a detected signal.
Claim 19
Dependent Claim
60 words
A spread spectrum communications receiver comprising: generic-spread-spectrum-processing means for recovering a carrier signal from a spread-spectrum-communications signal; message-spread-spectrum-processing means for despreading a spread-spectrum-communications signal as a modulated-data signal; acquisition means responsive to acquiring and tracking the recovered-carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered carrier signal; and detection means for converting the modulated-data signal to a detected signal.
Claim 20
Dependent Claim
34 words
The spread spectrum communications receiver as set forth in claim 15 wherein said detection means includes a synchronous detector responsive to the recovered-carrier signal for synchronously demodulating the modulated-data signal as the detected signal.
Claim 21
Dependent Claim
34 words
The spread spectrum communications receiver as set forth in claim 15 wherein said message-spread-spectrum-processing means includes means for storing a replica of the message-chip-code signal for despreading the spread-spectrum-communications signal as the modulated-data signal.
Claim 22
Dependent Claim
35 words
The spread spectrum communications receiver as set forth in claim 15 wherein said generic-spread-spectrum-processing means includes means for storing a replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as the recovered carrier signal.
Claim 23
Dependent Claim
28 words
The spread spectrum communications receiver as set forth in claim 15 wherein said detection means includes an envelope detector for converting the modulated-data signal to the detected signal.
Claim 24
Dependent Claim
41 words
The spread spectrum communications receiver as set forth in claim 18 wherein: said generic-spread-spectrum-processing means generates a generic-chip-code signal; and said message-spread-spectrum means, responsive to the generic-chip-code signal, generates a message-chip-code signal for despreading the spread-spectrum-communications signal as the modulated-data signal.
Claim 25
Dependent Claim
58 words
The spread spectrum communications receiver as set forth in claim 15 wherein said detection means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive to the detected signal at an input to said lowpass filter for integrating and dumping said lowpass filter with said electronic switch.
Claim 26
Dependent Claim
58 words
The spread spectrum communications receiver as set forth in claim 20 wherein said detection means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive coupled to said generic-spread-spectrum-processing means and responsive to the generic-chip-code signal for integrating and dumping said lowpass filter with said electronic switch.
Claim 27
Dependent Claim
177 words
A spread spectrum communications system for use over a communications channel, comprising: generic means for generating a generic-chip-code signal; a plurality of message means for generating a plurality of message-chip-code signals; a plurality of spreading means for spread-spectrum processing a plurality of message data with the plurality of message-chip-code signals to generate a plurality of spread-spectrum-processed signals; summer means for combining the generic-chip-code signal with the plurality of spread-spectrum-processed signals; means for transmitting the combined generic-chip-code signal and the plurality of spread-spectrum-processed signals, on a carrier signal over said communications channel as a spread-spectrum-communications signal; generic-spread-spectrum-processing means for recovering the carrier signal from the spread-spectrum-communications signal and for generating a replica of the generic-chip-code signal; acquisition means responsive to acquiring and tracking the recovered carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; of message-spread-spectrum-processing means synchronized to the replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as a plurality of modulated-data signals; and a plurality of detection means for detecting the plurality of modulated-data signals as a plurality of detected signals, respectively.
Claim 28
Dependent Claim
177 words
A spread spectrum communications system for use over a communications channel, comprising: generic means for generating a generic-chip-code signal; a plurality of message means for generating a plurality of message-chip-code signals; a plurality of spreading means for spread-spectrum processing a plurality of message data with the plurality of message-chip-code signals to generate a plurality of spread-spectrum-processed signals; summer means for combining the generic-chip-code signal with the plurality of spread-spectrum-processed signals; means for transmitting the combined generic-chip-code signal and the plurality of spread-spectrum-processed signals, on a carrier signal over said communications channel as a spread-spectrum-communications signal; generic-spread-spectrum-processing means for recovering the carrier signal from the spread-spectrum-communications signal and for generating a replica of the generic-chip-code signal; acquisition means responsive to acquiring and tracking the recovered carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; of message-spread-spectrum-processing means synchronized to the replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as a plurality of modulated-data signals; and a plurality of detection means for detecting the plurality of modulated-data signals as a plurality of detected signals, respectively.
Claim 29
Dependent Claim
44 words
The spread spectrum communications system as set forth in claim 23 wherein said plurality of detection means includes a plurality of a synchronous detectors responsive to the recovered-carrier signal for synchronously detecting the plurality of modulated-data signals as the plurality of detected signals, respectively.
Claim 30
Dependent Claim
40 words
The spread spectrum communications system as set forth in claim 23 wherein said plurality of message-spread-spectrum-processing means includes means for storing a plurality of replicas of the message-chip-code signals for despreading the spread-spectrum-communications signal as the plurality of modulated-data signals.
Claim 31
Dependent Claim
34 words
The spread spectrum communications system as set forth in claim 23 wherein said generic-spread-spectrum-processing means includes means for storing a replica of the generic-chip-code signal for despreading the spread-spectrum-communications signal as the recovered-carrier signal.
Claim 32
Dependent Claim
37 words
The spread spectrum communications system as set forth in claim 23 wherein a plurality of detection means includes a plurality of envelope detectors for converting the plurality of modulated-data signals to the plurality of detected signals, respectively.
Claim 33
Dependent Claim
27 words
The spread spectrum communications system as set forth in claim 23 wherein said plurality of message means is synchronized to the generic-chip-code signal from said generic means.
Claim 34
Dependent Claim
64 words
The spread spectrum communications system as set forth in claim 23 an output of each of the plurality of detection means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive to the detected signal at an input to said lowpass filter for integrating and dumping said lowpass filter and said electronic switch.
Claim 35
Dependent Claim
65 words
The spread spectrum communications system as set forth in claim 23 further including coupled to an output of said detection means: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive coupled to said generic-spread-spectrum-processing means and responsive to the replica of the generic-chip-code signal for integrating and dumping said lowpass filter and said electronic switch.
Claim 36
Dependent Claim
75 words
A spread-spectrum transmitter system comprises of: generic means for generating a generic-chip-code signal; message means synchronized to the generic-chip-code signal for generating a message-chip-code signal; spreading means for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; summer means for combining the generic-chip-code signal with the spread-spectrum-processed signal; and means for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal.
Claim 37
Dependent Claim
75 words
A spread-spectrum transmitter system comprises of: generic means for generating a generic-chip-code signal; message means synchronized to the generic-chip-code signal for generating a message-chip-code signal; spreading means for spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; summer means for combining the generic-chip-code signal with the spread-spectrum-processed signal; and means for transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal.
Claim 38
Dependent Claim
26 words
The spread-spectrum transmitter system as set forth in claim 31 wherein said spreading means includes an EXCLUSIVE-OR gate for processing message data with the message-chip-code signal.
Claim 39
Dependent Claim
82 words
A spread spectrum communications receiver comprising: generic-spread-spectrum-processing means for generating a generic-chip-code signal and recovering a carrier signal from a spread-spectrum-communications signal; a plurality of message-spread-spectrum-processing means synchronized to the generic-chip-code signal for despreading a spread-spectrum-communications signal as a plurality of modulated-data signals; acquisition means responsive to acquiring and tracking the recovered carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; and a plurality of detection means for converting the plurality of modulated-data signals to a plurality of detected signals.
Claim 40
Dependent Claim
82 words
A spread spectrum communications receiver comprising: generic-spread-spectrum-processing means for generating a generic-chip-code signal and recovering a carrier signal from a spread-spectrum-communications signal; a plurality of message-spread-spectrum-processing means synchronized to the generic-chip-code signal for despreading a spread-spectrum-communications signal as a plurality of modulated-data signals; acquisition means responsive to acquiring and tracking the recovered carrier signal for synchronizing said generic-spread-spectrum-processing means to the recovered-carrier signal; and a plurality of detection means for converting the plurality of modulated-data signals to a plurality of detected signals.
Claim 41
Dependent Claim
38 words
The spread spectrum communications receiver as set forth in claim 33 wherein each of said plurality of detection means includes a synchronous detector responsive to the recovered-carrier signal for synchronously demodulating the modulated-data signal as a detected signal.
Claim 42
Dependent Claim
63 words
The spread spectrum communications receiver as set forth in claim 33 wherein an output of each of said detection means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive to the detected signal at an input to said lowpass filter for integrating and dumping said lowpass filter with said electronic switch.
Claim 43
Dependent Claim
63 words
The spread spectrum communications receiver as set forth in claim 33 wherein an output of each of said detection means further includes: a low pass filter; an electronic switch coupled at an output of said lowpass filter; and bit means responsive coupled to said generic-spread-spectrum-processing means and responsive to the generic-chip-code signal for integrating and dumping said lowpass filter with said electronic switch.
Claim 44
Independent Claim
66 words
A method for transmitting spread spectrum communications, comprising the steps of: generating a generic-chip-code signal; generating a message-chip-code signal synchronously with the generic-chip-code signal; spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; combining the generic-chip-code signal with the spread-spectrum-processed signal; and transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal.
Claim 45
Independent Claim
66 words
A method for transmitting spread spectrum communications, comprising the steps of: generating a generic-chip-code signal; generating a message-chip-code signal synchronously with the generic-chip-code signal; spread-spectrum processing message data with the message-chip-code signal to generate a spread-spectrum-processed signal; combining the generic-chip-code signal with the spread-spectrum-processed signal; and transmitting the combined generic-chip-code signal and spread-spectrum-processed signal on a carrier signal over a communications channel as a spread-spectrum-communications signal.
Claim 46
Independent Claim
70 words
A method for receiving spread spectrum communications comprising the steps of: generating a generic-chip-code signal from a spread-spectrum-communications signal; recovering a carrier signal from the spread-spectrum-communications signal; despreading, synchronously with the generic-chip-code signal, the spread-spectrum-communications signal as a modulated-data signal; acquiring and tracking the recovered carrier signal; synchronizing the step of generating of the generic-chip-code signal to the recovered carrier signal; and converting the modulated-data signal to a detected signal.
Claim 47
Independent Claim
70 words
A method for receiving spread spectrum communications comprising the steps of: generating a generic-chip-code signal from a spread-spectrum-communications signal; recovering a carrier signal from the spread-spectrum-communications signal; despreading, synchronously with the generic-chip-code signal, the spread-spectrum-communications signal as a modulated-data signal; acquiring and tracking the recovered carrier signal; synchronizing the step of generating of the generic-chip-code signal to the recovered carrier signal; and converting the modulated-data signal to a detected signal.
Claim 48
Dependent Claim
25 words
The method as set forth in claim 38 wherein the converting step includes the step of synchronously demodulating the modulated-data signal as a detected signal.
Claim 49
Dependent Claim
28 words
The method as set forth in claim 38 wherein the despreading step includes the step of storing a replica of the message-chip-code signal for despreading the spread-spectrum-communications signal.
Claim 50
Dependent Claim
40 words
The method as set forth in claim 38 wherein the recovering step includes the steps of: storing a replica of the generic-chip-code signal; and despreading the spread-spectrum-communications signal with the replica of the generic-chip-code signal as the recovered carrier signal.
Claim 51
Dependent Claim
17 words
The method as set forth in claim 38 wherein the converting step includes using an envelope detector.
Claim 52
Dependent Claim
34 words
The method as set forth in claim 41 further including the steps of: generating a generic-chip-code signal; generating a message-chip-code signal; and despreading the spread-spectrum-communications signal with the message-chip-code signal as the modulated-data signal.
Claim 53
Dependent Claim
41 words
The method as set forth in claim 38 further comprising the steps of: filtering the detected signal through a low pass filter; passing the filtered signal through an electronic switch; and integrating and dumping the filtered signal with the electronic switch.
Claim 54
Dependent Claim
47 words
The method as set forth in claim 38 further comprising the steps of: filtering the detected signal through a low pass filter; passing the filtered signal through an electronic switch; and integrating and dumping the filtered signal with the electronic switch in response to the generic-chip-code signal.
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