US5796774A
Expired / Lapsed
US
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Spread spectrum communication apparatus with conversion of input patterns to uniform spectral patterns
Assignee: Canon Inc
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Filing: 1996-02-16
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Granted: 1998-08-18
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Expires: 2016-02-16
Abstract
Abstract A spread spectrum communication apparatus, which can convert a specific pattern into a pattern whose spectrum becomes uniform even if the specific pattern is input, comprises process means for processing parallel data using a plurality of spread codes, and communication means, connected to said process means, for communicating the parallel data processed by the plurality of spread codes, whereby transfer quality can be improved.
Inventors
- 👤 Ichiro Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:11
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/10; H04B; H04B1/00; H04B1/69; H04B1/707; H04J13/0007; H04J13/0022
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
66 words
A spread spectrum communication method comprising the steps of: processing parallel data; spreading each of the parallel data processed in said processing step, using a different spread code; and communicating the parallel data, each of which is spread using the spread code, wherein the parallel data is processed in said processing step such that a spectrum of a signal communicated in said communicating step becomes uniform.
Claim 2
Dependent Claim
66 words
A spread spectrum communication method comprising the steps of: processing parallel data; spreading each of the parallel data processed in said processing step, using a different spread code; and communicating the parallel data, each of which is spread using the spread code, wherein the parallel data is processed in said processing step such that a spectrum of a signal communicated in said communicating step becomes uniform.
Claim 3
Dependent Claim
34 words
A method according to claim 1, wherein in said processing step a one-to-one mapping conversion is performed on the data, which is to be communicated, such that the spectrum of the signal becomes uniform.
Claim 4
Dependent Claim
17 words
a method according to claim 2, wherein a conversion rule of a mapping conversion is desirably set.
Claim 5
Dependent Claim
31 words
A method according to claim 1, wherein in said processing step predetermined bits of data included in the parallel data are inverted such that the spectrum of the signal becomes uniform.
Claim 6
Dependent Claim
15 words
A method according to claim 4, wherein the bits to be inverted are desirably set.
Claim 7
Dependent Claim
16 words
A method according to claim 4, wherein the parallel data is scrambled in said processing step.
Claim 8
Dependent Claim
15 words
A method according to claim 1, wherein the plurality of spread codes are desirably set.
Claim 9
Dependent Claim
31 words
A method according to claim 1, wherein the parallel data are processed in said processing step such that a spectrum, when parallel data frequently and continuously communicated are spread, becomes uniform.
Claim 10
Dependent Claim
30 words
A method according to claim 1, wherein the parallel data are processed in said processing step such that the spectrum of the signal becomes uniform when predetermined data is communicated.
Claim 11
Dependent Claim
69 words
A spread spectrum communication apparatus comprising: process means for processing parallel data; spread means for spreading the parallel data processed by said process means using a plurality of spread codes; and communication means for communicating the parallel data spread using the plurality of spread codes, wherein said process means processes the parallel data such that a spectrum of a signal, which is communicated by said communication means, becomes uniform.
Claim 12
Dependent Claim
69 words
A spread spectrum communication apparatus comprising: process means for processing parallel data; spread means for spreading the parallel data processed by said process means using a plurality of spread codes; and communication means for communicating the parallel data spread using the plurality of spread codes, wherein said process means processes the parallel data such that a spectrum of a signal, which is communicated by said communication means, becomes uniform.
Claim 13
Dependent Claim
35 words
An apparatus according to claim 10, wherein said process means includes conversion means for performing a one-to-one mapping conversion to data which is simultaneously communicated by said communication means, following spreading by said spread means.
Claim 14
Dependent Claim
23 words
An apparatus according to claim 11, wherein said process means includes setting means for desirably setting a conversion rule of said conversion means.
Claim 15
Dependent Claim
24 words
An apparatus according to claim 10, wherein said process means includes inversion means for inverting predetermined bits of data included in the parallel data.
Claim 16
Dependent Claim
22 words
An apparatus according to claim 13, wherein said process means includes setting means for desirably setting bits which are to be inverted.
Claim 17
Dependent Claim
18 words
An apparatus according to claim 13, wherein said process means includes scramble means for scrambling the parallel data.
Claim 18
Dependent Claim
18 words
An apparatus according to claim 10, further including setting means for desirably setting the plurality of spread codes.
Claim 19
Dependent Claim
29 words
An apparatus according to claim 10, wherein said process means processes the parallel data such that a spectrum, when parallel data frequently and continuously communicated are spread, becomes uniform.
Claim 20
Dependent Claim
28 words
An apparatus according to claim 10, wherein said process means processes the parallel data such that the spectrum of the signal becomes uniform when predetermined data is communicated.
References Cited (Backward Citations)
US3518547A
Cited
US3519746A
Cited
US4958359A
Cited
US5199045A
Cited
US5204877A
Cited
US5467367A
Cited
US5504775A
Cited
US5537396A
Cited
US5555268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |