EP0851603A2
Expired / Lapsed
EP
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System and method for spread spectrum code position modulation and wireless local area network employing the same
Assignee: Nokia of America Corp
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Filing: 1997-12-16
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Granted: —
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Expires: 2017-12-16
Abstract
Abstract A system for, and method of, generating a spread spectrum code position modulated waveform and a wireless local area network (LAN) containing the system or the method. The system includes: (1) a spread-spectrum encoder that receives and encodes portions of an information signal with a multi-chip code having a predetermined length to create therefrom a stream of sequences, each of the sequences having the predetermined length and (2) a transmitter that periodically transmits the each of the sequences at a time interval that differs from the predetermined length, a data rate of transmission of the information signal thereby allowed to increase.
Inventors
- 👤 Hans Van Driest
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 00:01
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4902; H04B14/00; H04B14/02; H04B14/026; H04J; H04J13/00; H04J13/0003; H04J13/0077; H04B2201/00; H04B2201/69; H04B2201/694; H04B2201/707; H04B2201/70703
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
81 words
A system for generating a spread spectrum code
position modulated waveform, comprising: a spread-spectrum encoder that receives and encodes
portions of an information signal with a multi-chip code
having a predetermined length to create therefrom a stream
of sequences, each of said sequences having said
predetermined length; and a transmitter that periodically transmits said each of
said sequences at a time interval that differs from said
predetermined length, a data rate of transmission of said
information signal thereby allowed to increase.
Claim 2
Dependent Claim
23 words
The system as recited in Claim 1 wherein said
information signal is digital, said portions corresponding
to individual bits of said information signal.
Claim 3
Dependent Claim
15 words
The system as recited in Claim 1 wherein said
multi-chip code is a Barker code.
Claim 4
Dependent Claim
16 words
The system as recited in Claim 1 wherein said
predetermined length is less than 20 chips.
Claim 5
Dependent Claim
38 words
The system as recited in Claim 1 wherein said
stream of sequences is processed to create main lobes
therein, said time interval being one chip greater than an
allowable range of chip offsets applied to said main lobes.
Claim 6
Dependent Claim
14 words
The system as recited in Claim 1 wherein said time
interval is 9 chips.
Claim 7
Dependent Claim
28 words
The system as recited in Claim 1 wherein said time
interval is less than said predetermined length, a data rate
of transmission of said information signal thereby
increasing.
Claim 8
Independent Claim
76 words
A method of generating a spread spectrum code
position modulated waveform, comprising the steps of: spread-spectrum encoding portions of an information
signal with a multi-chip code having a predetermined length
to create therefrom a stream of sequences, each of said
sequences having said predetermined length; and periodically transmitting said each of said sequences
at a time interval that differs from said predetermined
length, a data rate of transmission of said information
signal thereby allowed to increase.
Claim 9
Dependent Claim
30 words
The method as recited in Claim 8 wherein said
information signal is digital, said step of spread-spectrum
encoding comprising the step of spread-spectrum encoding
individual bits of said information signal.
Claim 10
Dependent Claim
29 words
The method as recited in Claim 8 wherein said step
of spread-spectrum encoding comprises the step of spread-spectrum
encoding said portions of said information signal
with a Barker code.
Claim 11
Dependent Claim
16 words
The method as recited in Claim 8 wherein said
predetermined length is less than 20 chips.
Claim 12
Dependent Claim
41 words
The method as recited in Claim 8 further
comprising the step of processing said stream of sequences
to create main lobes therein, said time interval being one
chip greater than an allowable range of chip offsets applied
to said main lobes.
Claim 13
Dependent Claim
14 words
The method as recited in Claim 8 wherein said time
interval is 9 chips.
Claim 14
Dependent Claim
28 words
The method as recited in Claim 8 wherein said time
interval is less than said predetermined length, a data rate
of transmission of said information signal thereby increasing.
Claim 15
Dependent Claim
148 words
A wireless local area network (LAN), comprising: a plurality of computers, each of said plurality of computers having a
processor, memory and wireless data communication circuitry, said wireless
communication circuitry allowing transmission and reception of digital data among
said plurality of computers and including a system as claimed in any of claims 1 to 7
arranged to receive said digital data as said information signal for generating a
spread spectrum code position modulated waveform to be transmitted by said
wireless communication circuitry, a spread-spectrum encoder that receives and encodes said digital data
with a multi-chip code having a predetermined length to create therefrom a stream of
sequences, each of said sequences having said predetermined length, and a transmitter that periodically transmits said each of said sequences at a
time interval that differs from said predetermined length, a rate of transmission of
said digital data thereby allowed to increase.
References Cited (Backward Citations)
No citation records indexed.
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