US5144641A
Expired / Lapsed
US
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Spread spectrum communication device
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1991-02-11
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Granted: 1992-09-01
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Expires: 2011-02-11
Abstract
Abstract A multiplex communication device by the spread spectrum communication system is disclosed, in which a reference signal and a plurality of information signals are multiplexed to be transmitted after having spreading-modulated each of them, and data demodulation for the plurality of information signals is effected on the basis of a correlation-demodulated reference signal by executing correlation operation of this multiplexed received signal with a reference signal by means of a single correlator.
Inventors
- 👤 Shigeo Akazawa
- 👤 Yoshitaka Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/10; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/709; H04J13/0007; H04J13/0022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A spread spectrum communication device provided with a transmitter comprising: serial-parallel converting means for converting serial data into a plurality of parallel data sets; first PN code generating means for generating at least a first PN code in response to a PN clock; spreading modulating means, in which said plurality of parallel data sets are inputted and which outputs said first PN code in the form of a plurality of modulated data sets corresponding to respective said parallel data sets; delaying means for outputting said plurality of modulated data sets, while delaying them in time; and RF modulating means for RF-modulating each of said plurality of delayed modulated data sets and synthesizing a signal to be transmitted by combining them.
Claim 2
Dependent Claim
120 words
A spread spectrum communication device provided with a transmitter comprising: serial-parallel converting means for converting serial data into a plurality of parallel data sets; first PN code generating means for generating at least a first PN code in response to a PN clock; spreading modulating means, in which said plurality of parallel data sets are inputted and which outputs said first PN code in the form of a plurality of modulated data sets corresponding to respective said parallel data sets; delaying means for outputting said plurality of modulated data sets, while delaying them in time; and RF modulating means for RF-modulating each of said plurality of delayed modulated data sets and synthesizing a signal to be transmitted by combining them.
Claim 3
Dependent Claim
59 words
A spread spectrum communication device according to claim 1, wherein in said transmitter said first PN code generating means generates said first PN code and a second PN code in response to a PN clock, and said spreading modulating means outputs selectively said first or second PN code in response to each of said plurality of parallel data sets.
Claim 4
Dependent Claim
141 words
A spread spectrum communication device provided with a receiver comprising: PN code generating means for generating in response to a PN clock a first PN code, which is identical to but inverted in time with respect to a second PN code included in a received signal; reference signal generating means for generating a reference signal based on said first PN code; a correlator for correlating said receiving signal with said reference signal; converting means for converting a correlation output of said correlator into a binary signal; sampling means for sampling said binary signal on the basis of a sampling signal generated for every predetermined period of time and converting said binary signal into a plurality of parallel data sets; and data demodulating means for taking-in said plurality of parallel data sets with a predetermined timing and demodulating them into serial data.
Claim 5
Dependent Claim
141 words
A spread spectrum communication device provided with a receiver comprising: PN code generating means for generating in response to a PN clock a first PN code, which is identical to but inverted in time with respect to a second PN code included in a received signal; reference signal generating means for generating a reference signal based on said first PN code; a correlator for correlating said receiving signal with said reference signal; converting means for converting a correlation output of said correlator into a binary signal; sampling means for sampling said binary signal on the basis of a sampling signal generated for every predetermined period of time and converting said binary signal into a plurality of parallel data sets; and data demodulating means for taking-in said plurality of parallel data sets with a predetermined timing and demodulating them into serial data.
Claim 6
Dependent Claim
25 words
A spread spectrum communication device according to claim 3, wherein said reference signal generating means RF-modulates said first PN code to obtain said reference signal.
Claim 7
Dependent Claim
149 words
A spread spectrum communication device according to claim 1, provided with a receiver comprising: second PN code generating means for generating in response to a PN clock a third PN code, which is identical to but inverted in time with respect to a PN code included in a received signal; reference signal generating means for generating a reference signal based on said third PN code; a correlator for correlating said received signal with said reference signal; converting means for converting a correlation output of said correlator into a binary signal; sampling means for sampling said binary signal on the basis of a sampling signal generated for every predetermined period of time and converting said binary signal into a plurality of parallel data sets; and data demodulating means for taking-in said plurality of parallel data sets from said sampling means with a predetermined timing and demodulating them into serial data.
Claim 8
Dependent Claim
149 words
A spread spectrum communication device according to claim 2, provided with a receiver comprising: second PN code generating means for generating in response to a PN clock a third PN code, which is identical to but inverted in time with respect to a PN code included in a received signal; reference signal generating means for generating a reference signal based on said third PN code; a correlator for correlating said received signal with said reference signal; converting means for converting a correlation output of said correlator into a binary signal; sampling means for sampling said binary signal on the basis of a sampling signal generated for every predetermined period of time and converting said binary signal into a plurality of parallel data sets; and data demodulating means for taking-in said plurality of parallel data sets from said sampling means with a predetermined timing and demodulating them into serial data.
Claim 9
Dependent Claim
42 words
A spread spectrum communication device according to claim 21, wherein said RF modulating means includes a plurality of multipliers, to at least one of the other multipliers being given said RF carrier and a respective one of said delayed modulated data sets.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |