US5260969A
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Spectrum diffusion communication receiving apparatus
Assignee: Canon Inc
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Filing: 1992-11-17
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Granted: 1993-11-09
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Expires: 2012-11-17
Abstract
Abstract A spectrum diffusion communication receiving apparatus includes a first generating unit for generating a reference code, a second generating unit for generating a reference signal in synchronism with the reference code, a correlating unit for obtaining a correlation between a received signal and the reference code, and a decoding for decoding the received signal in accordance with the reference signal and a correlation output from the correlating unit.
Inventors
- 👤 Ichiro Kato
- 👤 Toshihiko Myojo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/70712
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
88 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; first correlating means for obtaining a correlation between a received signal and the reference code; second generating means for generating a decoding code in accordance with the a correlation output from said first correlating means; second correlating means for obtaining a correlation between the received signal and the decoding code; and adjusting means for adjusting a code start of the reference code in accordance with the correlation output from said first correlating means.
Claim 2
Dependent Claim
88 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; first correlating means for obtaining a correlation between a received signal and the reference code; second generating means for generating a decoding code in accordance with the a correlation output from said first correlating means; second correlating means for obtaining a correlation between the received signal and the decoding code; and adjusting means for adjusting a code start of the reference code in accordance with the correlation output from said first correlating means.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1, wherein said adjusting means comprises control means for controlling the generation of the reference code in accordance with the reference code and the correlation output from said first correlating means.
Claim 4
Dependent Claim
36 words
An apparatus according to claim 2, wherein said control means controls the generation of the reference code in accordance with a phase difference between the reference code and the correlation output from said first correlating means.
Claim 5
Dependent Claim
60 words
An apparatus according to claim 3, wherein said control means comprises; third generating means for generating a signal corresponding to the phase difference between the reference code and the correlation output from said first correlating means; and oscillating means for supplying a clock having a frequency corresponding to the signal generated by said third generating means to said adjusting means.
Claim 6
Dependent Claim
24 words
An apparatus according to claim 4, wherein said first generating means generates a reference signal by frequency-dividing the clock generated by said oscillating means.
Claim 7
Dependent Claim
21 words
An apparatus according to claim 2, wherein the reference code is obtained by inverting the decoding code on a time axis.
Claim 8
Dependent Claim
18 words
An apparatus according to claim 1, wherein the reference code is a time inversion of the decoding code.
Claim 9
Dependent Claim
22 words
An apparatus according to claim 1, wherein said first generating means generates a reference signal for every period of the reference code.
Claim 10
Dependent Claim
13 words
An apparatus according to claim 1, wherein said correlating means is a convolver.
Claim 11
Dependent Claim
25 words
An apparatus according to claim 9, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 12
Dependent Claim
28 words
An apparatus according to claim 1, wherein said adjusting means adjusts the code start of the reference code so that the code start coincides with the correlation output.
Claim 13
Dependent Claim
67 words
A spectrum diffusion communication receiving apparatus comprising: generating means for generating a reference code; correlating means for obtaining a correlation between a received signal and the reference code; decoding means for decoding the received signal in accordance with a correlation output from said correlating means; and adjusting means for adjusting a code start of the reference code in accordance with the correlation output from said correlating means.
Claim 14
Dependent Claim
67 words
A spectrum diffusion communication receiving apparatus comprising: generating means for generating a reference code; correlating means for obtaining a correlation between a received signal and the reference code; decoding means for decoding the received signal in accordance with a correlation output from said correlating means; and adjusting means for adjusting a code start of the reference code in accordance with the correlation output from said correlating means.
Claim 15
Dependent Claim
35 words
An apparatus according to claim 12, wherein said decoding means comprises: second generating means for generating a decoding code; and second correlating means for obtaining a correlation between the received signal and the decoding code.
Claim 16
Dependent Claim
43 words
An apparatus according to claim 13, wherein said decoding means resets said second generating means when the phase difference between the reference code generated by said generating means and the correlation output from said correlating means becomes not less than a predetermined value.
Claim 17
Dependent Claim
18 words
An apparatus according to claim 13, wherein the reference code is a time inversion of the decoding code.
Claim 18
Dependent Claim
36 words
An apparatus according to claim 13, wherein said decoding means resets said second generating means in accordance with the phase difference between the correlation output from said correlating means and code start of the decoding code.
Claim 19
Dependent Claim
37 words
An apparatus according to claim 12, wherein said control means controls and decoding means in accordance with a phase difference between the sync signal generated by said generating means and the correlation output from said correlating means.
Claim 20
Dependent Claim
13 words
An apparatus according to claim 12, wherein said correlating means is a convolver.
Claim 21
Dependent Claim
25 words
An apparatus according to claim 18, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 22
Dependent Claim
55 words
An apparatus according to claim 12, wherein said decoding means counts a time interval from the reference signal until the occurrence of the correlation output from said correlating means, and when, the counted time interval elapses from an occurrence of the correlation output from said correlating means, said decoding means is set to start decoding.
Claim 23
Dependent Claim
51 words
An apparatus according to claim 12, wherein said adjusting means includes second generating means for generating a synchronizing signal indicating the code start of the reference code, and adjusts the code start of the reference code so that a phase difference between the synchronizing signal and the correlation output is removed.
Claim 24
Dependent Claim
28 words
An apparatus according to claim 12, wherein said adjusting means adjusts the code start of the reference code so that the code start coincides with the correlation output.
Claim 25
Dependent Claim
109 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; first correlating means for obtaining a correlation between a received signal and the reference code; second generating means for generating a decoding code; second correlating means for obtaining a correlation between the received signal and the decoding code; and control means for controlling said second generating means in accordance with a code start of the decoding code and a correlation output from said first correlating means when a phase difference between the code start of the decoding code and the correlation output from said first correlating means becomes not less than a predetermined value.
Claim 26
Dependent Claim
109 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; first correlating means for obtaining a correlation between a received signal and the reference code; second generating means for generating a decoding code; second correlating means for obtaining a correlation between the received signal and the decoding code; and control means for controlling said second generating means in accordance with a code start of the decoding code and a correlation output from said first correlating means when a phase difference between the code start of the decoding code and the correlation output from said first correlating means becomes not less than a predetermined value.
Claim 27
Dependent Claim
33 words
An apparatus according to claim 23, wherein said control means controls said second generating means in accordance with code start of the reference code and the correlation output from said first correlating means.
Claim 28
Dependent Claim
15 words
An apparatus according to claim 23, wherein said control means initializes said second generating means.
Claim 29
Dependent Claim
18 words
An apparatus according to claim 23, wherein the reference code is a time inversion of the decoding code.
Claim 30
Dependent Claim
13 words
An apparatus according to claim 23, wherein said correlating means is a convolver.
Claim 31
Dependent Claim
25 words
An apparatus according to claim 27, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 32
Dependent Claim
97 words
A spectrum diffusion communication receiving apparatus comprising: first correlating means for obtaining a correlation between a received signal and a reference code; first generating means for generating a decoding code; second correlating means for obtaining a correlation between the received signal and the decoding code: second generating means for generating a sync signal synchronized with the decoding code; and control means for resetting said first generating means when the phase difference between the sync signal generated by said second generating means and a peak of a correlation output from said first correlating means exceeds a predetermined threshold.
Claim 33
Dependent Claim
97 words
A spectrum diffusion communication receiving apparatus comprising: first correlating means for obtaining a correlation between a received signal and a reference code; first generating means for generating a decoding code; second correlating means for obtaining a correlation between the received signal and the decoding code: second generating means for generating a sync signal synchronized with the decoding code; and control means for resetting said first generating means when the phase difference between the sync signal generated by said second generating means and a peak of a correlation output from said first correlating means exceeds a predetermined threshold.
Claim 34
Dependent Claim
35 words
An apparatus according to claim 29, wherein said decoding means comprises: second generating means for generating a decoding code; and second correlating means for obtaining a correlation between the received signal and the decoding code.
Claim 35
Dependent Claim
24 words
An apparatus according to claim 29, wherein said second generating means generates a sync signal in synchronism with a start of the decoding code.
Claim 36
Dependent Claim
20 words
An apparatus according to claim 29, wherein said first correlating means comprises: third generating means for generating the reference code.
Claim 37
Dependent Claim
40 words
An apparatus according to claim 29, wherein said control means resets said first generating means in accordance with the phase difference between the correlation output from said first correlating means and the sync signal generated by said second generating means.
Claim 38
Dependent Claim
18 words
An apparatus according to claim 29, wherein the reference code is a time inversion of the decoding code.
Claim 39
Dependent Claim
14 words
An apparatus according to claim 29, wherein said first correlating means is a convolver.
Claim 40
Dependent Claim
25 words
An apparatus according to claim 35, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 41
Dependent Claim
89 words
A spectrum diffusion communication receiving apparatus comprising: generating means for generating a reference code; correlating means for obtaining a correlation between a received signal and the reference code from said generating means; comparing means for comparing phases of the correlation output from said correlating means and the reference code from said generating means; and demodulating means for demodulating the received signal in accordance with a comparison output from said comparing means, wherein said generating means generates the reference code in accordance with a comparison output from said comparing means.
Claim 42
Dependent Claim
89 words
A spectrum diffusion communication receiving apparatus comprising: generating means for generating a reference code; correlating means for obtaining a correlation between a received signal and the reference code from said generating means; comparing means for comparing phases of the correlation output from said correlating means and the reference code from said generating means; and demodulating means for demodulating the received signal in accordance with a comparison output from said comparing means, wherein said generating means generates the reference code in accordance with a comparison output from said comparing means.
Claim 43
Dependent Claim
20 words
An apparatus according to claim 37, wherein said demodulating means demodulates the received signal in accordance with a demodulating code.
Claim 44
Dependent Claim
37 words
An apparatus according to claim 38, wherein said demodulating means comprises second generating means for generating a demodulating code form a head bit of the demodulating code in accordance with the comparison output from said comparing means.
Claim 45
Dependent Claim
24 words
An apparatus according to claim 38, wherein the demodulating code is determined according to a diffusing code which is used at a transmitting side.
Claim 46
Dependent Claim
32 words
An apparatus according to claim 37, wherein said generating means generates the reference code from a head bit of the reference code in accordance with the comparison output from said comparison means.
Claim 47
Dependent Claim
44 words
An apparatus according to claim 37, further comprising oscillating means for generating a clock at a frequency in accordance with the comparison output from said comparing means, wherein said generating means generates the reference code in accordance with the clock from said oscillating means.
Claim 48
Dependent Claim
23 words
An apparatus according to claim 42, wherein said demodulating means demodulates the received signal in accordance with the clock from said oscillating means.
Claim 49
Dependent Claim
13 words
An apparatus according to claim 37, wherein said correlating means comprises a convolver.
Claim 50
Dependent Claim
25 words
An apparatus according to claim 44, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 51
Dependent Claim
25 words
An apparatus according to claim 37, wherein the reference code is a time inversion of a diffusing code which is used at a transmitting side.
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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) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |