US5835488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pseudo random noise sequence code generator and CDMA radio communication terminal
Assignee: Sony Corp
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Filing: 1996-05-14
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Granted: 1998-11-10
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Expires: 2016-05-14
Abstract
Abstract A pseudo random noise sequence code generating circuit has a sequence generator (11) for sequentially generating a maximum length linear code sequence at an N-chip cycle and a first to (N-1)th vector multiplier (12 to 14) for obtaining values of skipped portions in the sequence generator by vector multiplication. It does so on the basis of the state value (S1) of a register forming the sequence generator, and generates a successive pseudo random noise sequence code based on an output of the sequence generator (PN1) and outputs of the first to the (N-1)th vector multiplier (PN2 to PN4). Thereby, the operating rate can be reduced to 1/N as compound to the prior art, and the operating voltage and electric power consumption can be reduced.
Inventors
- 👤 Takehiro Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:31
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/16; H04J13/10; G; G06; G06F; G06F7/00; G06F7/58; G06F7/582; G06F7/584; H04B; H04B1/00; H04B1/69; H04B1/707; H04J13/0007; H04J13/0022; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
40 words
A pseudo random noise generator comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle; and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means.
Claim 2
Dependent Claim
40 words
A pseudo random noise generator comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle; and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means.
Claim 3
Dependent Claim
47 words
The pseudo random noise generator according to claim 1 further including: control means for detecting the end of said sequence code and generating a control signal; and code inserting means responsive to the control signal for inserting a predetermined code at the end of said sequence code.
Claim 4
Dependent Claim
16 words
The pseudo random noise generator according to claim 2 wherein said control means comprises a comparator.
Claim 5
Dependent Claim
16 words
The pseudo random noise generator according to claim 2 wherein said control means comprises a counter.
Claim 6
Dependent Claim
33 words
The pseudo random noise generator according to claim 2 wherein said code inserting means comprises selecting means for selecting an output signal of one of said plural (1 to N-1) vector multiplying means.
Claim 7
Dependent Claim
41 words
The pseudo random noise generator according to claim 2 wherein said code inserting means comprises gate means for selecting an output signal of one of said plural (1 to N-1) vector multiplying means and an output signal of said control means.
Claim 8
Dependent Claim
42 words
A pseudo random noise generating method comprising: a sequence generating step for generating a maximum length linear sequence code at an N-chip cycle; and plural (1 to N-1) vector multiplying steps for generating a code not generated by said sequence generating means.
Claim 9
Dependent Claim
42 words
A pseudo random noise generating method comprising: a sequence generating step for generating a maximum length linear sequence code at an N-chip cycle; and plural (1 to N-1) vector multiplying steps for generating a code not generated by said sequence generating means.
Claim 10
Dependent Claim
95 words
A receiver for receiving a CDMA signal comprising: RF signal processing means for processing a received RF signal; de-spread means for de-spreading the received CDMA signal; a pseudo random noise generator for generating a PN code and comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle, and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means; decoding means for decoding a convolutional code and producing a decoded signal; and base band signal processing means for processing the decoded signal.
Claim 11
Dependent Claim
95 words
A receiver for receiving a CDMA signal comprising: RF signal processing means for processing a received RF signal; de-spread means for de-spreading the received CDMA signal; a pseudo random noise generator for generating a PN code and comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle, and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means; decoding means for decoding a convolutional code and producing a decoded signal; and base band signal processing means for processing the decoded signal.
Claim 12
Dependent Claim
50 words
The receiver according to claim 8 wherein said pseudo random noise generator further includes: control means for detecting the end of said sequence code and generating a control signal; and code inserting means responsive to said control signal for inserting a predetermined code at the end of said sequence code.
Claim 13
Dependent Claim
127 words
A communication apparatus for receiving and transmitting a CDMA signal comprising: an antenna; RF signal processing means for processing a received RF signal; de-spread means for de-spreading the received CDMA signal; a pseudo random noise generator for generating PN code and comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle, and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means; decoding means for decoding a convolutional code and producing a decoded signal; base band signal processing means for processing the decoded signal; coding means for coding the convolutional code and producing an output signal; and spread means for spreading the output signal of said coding means to generate a CDMA signal.
Claim 14
Dependent Claim
127 words
A communication apparatus for receiving and transmitting a CDMA signal comprising: an antenna; RF signal processing means for processing a received RF signal; de-spread means for de-spreading the received CDMA signal; a pseudo random noise generator for generating PN code and comprising: sequence generating means for generating a maximum length linear sequence code at an N-chip cycle, and plural (1 to N-1) vector multiplying means for generating a code not generated by said sequence generating means; decoding means for decoding a convolutional code and producing a decoded signal; base band signal processing means for processing the decoded signal; coding means for coding the convolutional code and producing an output signal; and spread means for spreading the output signal of said coding means to generate a CDMA signal.
Claim 15
Dependent Claim
50 words
The communication apparatus according to claim 10 wherein said pseudo random noise generator further includes: control means for detecting the end of said sequence and generating a control signal; and code inserting means responsive to said control signal for inserting a predetermined code at the end of said sequence code.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |