EP0369375A2
Expired / Lapsed
EP
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Spread spectrum communication receiving apparatus
Assignee: Canon Inc
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Filing: 1989-11-13
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Granted: —
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Expires: 2009-11-13
Abstract
Abstract A spectrum diffusion communication receiving apparatus includes a first generating unit for generating a reference code (114), a second generating unit (17) for generating a reference signal in synchronism with the reference code, a correlating unit (115) 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
- 👤 Kato Ichiro
- 👤 Myojo Toshihiko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 09:00
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/70712
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
65 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; second generating means for generating a reference signal in synchronism with the reference code; correlating means for obtaining a correlation between a received signal and the reference code; and decoding means for decoding the received signal in accordance with the reference signal and a correlation output from said correlating means.
Claim 2
Dependent Claim
65 words
A spectrum diffusion communication receiving apparatus comprising: first generating means for generating a reference code; second generating means for generating a reference signal in synchronism with the reference code; correlating means for obtaining a correlation between a received signal and the reference code; and decoding means for decoding the received signal in accordance with the reference signal and a correlation output from said correlating means.
Claim 3
Dependent Claim
49 words
An apparatus according to claim 1, wherein said decoding means comprises: third generating means for generating a decoding code in accordance with the reference signal and the correlation output from said correlating means; and second correlating means for obtaining a correlation between the received signal and the decoding code.
Claim 4
Dependent Claim
57 words
An apparatus according to claim 1, wherein said decoding means comprises: third generating means for generating a decoding code; control means for controlling said third generating means in accordance with the reference signal and the correlation output from said correlating means; and second correlating means for obtaining a correlation between the received signal and the decoding code.
Claim 5
Dependent Claim
33 words
An apparatus according to claim 3, wherein said control means drives said third generating means in accordance with a phase difference between the reference signal and the correlation output from said correlating means.
Claim 6
Dependent Claim
60 words
An apparatus according to claim 4, wherein said control means comprises: fourth generating means for generating a signal corresponding to the phase difference between the reference signal and the correlation output from said correlating means; and oscillating means for supplying a clock having a frequency corresponding to the signal generated by said fourth generating means to said third generating 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
21 words
An apparatus according to claim 3, wherein the reference code is obtained by inverting the decoding code on a time axis.
Claim 9
Dependent Claim
22 words
An apparatus according to claim 1, wherein said second generating means generates the reference signal for every period of the reference code.
Claim 10
Dependent Claim
24 words
An apparatus according to claim 5, wherein said second generating means generates the reference signal by frequency-dividing the clock generated by said oscillating means.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 1, wherein said correlating means is a convolver.
Claim 12
Dependent Claim
25 words
An apparatus according to claim 10, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 13
Dependent Claim
56 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; and control means for controlling said generating means in accordance with a peak of a correlation output from said correlating means and a phase of the reference code.
Claim 14
Dependent Claim
56 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; and control means for controlling said generating means in accordance with a peak of a correlation output from said correlating means and a phase of the reference code.
Claim 15
Dependent Claim
48 words
An apparatus according to claim 12, wherein said control means comprises: supplying means for supplying a clock to said generating means; and comparing means for comparing the peak of the correlation output from said correlating means and the phase of the reference code and controlling said supplying means.
Claim 16
Dependent Claim
21 words
An apparatus according to claim 12, wherein the reference signal is obtained by inverting the decoding code on a time axis.
Claim 17
Dependent Claim
13 words
An apparatus according to claim 12, wherein said correlating means is a convolver.
Claim 18
Dependent Claim
25 words
An apparatus according to claim 12, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 19
Dependent Claim
69 words
A spectrum diffusion communication receiving apparatus comprising: correlating means for obtaining a correlation between a received signal and a reference code; decoding means for decoding the received signal; generating means for generating a signal synchronized with decoding processing of said decoding means; and control means for controlling said decoding means in accordance with a sync signal generated by said generating means and a correlation output from said correlating means.
Claim 20
Dependent Claim
69 words
A spectrum diffusion communication receiving apparatus comprising: correlating means for obtaining a correlation between a received signal and a reference code; decoding means for decoding the received signal; generating means for generating a signal synchronized with decoding processing of said decoding means; and control means for controlling said decoding means in accordance with a sync signal generated by said generating means and a correlation output from said correlating means.
Claim 21
Dependent Claim
35 words
An apparatus according to claim 17, 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 22
Dependent Claim
23 words
An apparatus according to claim 18, wherein said generating means generates a sync signal in synchronism with code start of the decoding code.
Claim 23
Dependent Claim
37 words
An apparatus according to claim 17, wherein said control means controls said 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 24
Dependent Claim
37 words
An apparatus according to claim 17, wherein said correlating means comprises: third generating means for generating the reference code; and fourth generating means for generating a reference signal in synchronism with code start of the reference code.
Claim 25
Dependent Claim
48 words
An apparatus according to claim 18, wherein said control means resets said second generating means when said control means detects that the phase difference between the sync signal generated by said generating means and the correlation output from said correlating means becomes not less than a predetermined value.
Claim 26
Dependent Claim
36 words
An apparatus according to claim 22, wherein said control 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 reference code.
Claim 27
Dependent Claim
21 words
An apparatus according to claim 18, wherein the reference code is obtained by inverting the decoding code on a time axis.
Claim 28
Dependent Claim
13 words
An apparatus according to claim 17, wherein said correlating means is a convolver.
Claim 29
Dependent Claim
25 words
An apparatus according to claim 25, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
Claim 30
Dependent Claim
80 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 code start of the decoding code and a correlation output from said first correlating means.
Claim 31
Dependent Claim
80 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 code start of the decoding code and a correlation output from said first correlating means.
Claim 32
Dependent Claim
47 words
An apparatus according to claim 27, wherein said control means controls said second generating means when said control means detects that a phase difference between code start of the decoding code and the correlation output from said first correlating means becomes not less than a predetermined value.
Claim 33
Dependent Claim
33 words
An apparatus according to claim 27, 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 34
Dependent Claim
15 words
An apparatus according to claim 29, wherein said control means initializes said second generating means.
Claim 35
Dependent Claim
21 words
An apparatus according to claim 27, wherein the reference code is obtained by inverting the decoding code on a time axis.
Claim 36
Dependent Claim
13 words
An apparatus according to claim 27, wherein said correlating means is a convolver.
Claim 37
Dependent Claim
25 words
An apparatus according to claim 32, wherein a convolution time of said convolver is one period of the reference code or an integer multiple thereof.
References Cited (Backward Citations)
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