US5199045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication apparatus
Assignee: Canon Inc
•
Filing: 1992-04-13
•
Granted: 1993-03-30
•
Expires: 2012-04-13
Abstract
Abstract A spread communication system comprising a receiver, a diffusion convertor for converting a signal from the receiver, a control signal generator for generating a control signal representing an output level of the diffusion convertor, another diffusion convertor for converting data to be transmitted, a transmitter for transmitting data from the another diffusion convertor and a transmission controller for controlling a transmission level of the transmitter in accordance with the control signal from the control signal generator.
Inventors
- 👤 Ichiro Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
120 words
A communication apparatus comprising: receiving means for receiving a signal including a signal from a partner station; conversion means for converting the signal received by said receiving means in accordance with a diffusion code, wherein the diffusion code is determined in accordance with a diffusion code used in transmission by the partner station; control signal generating means coupled to the conversion means for generating a control signal corresponding to an output level of said conversion means; transmission means for transmitting data to the partner station; and transmission control means coupled to the transmission means for controlling a transmission level of a signal output of said transmission means in accordance with the control signal generated by said control signal generating means.
Claim 2
Dependent Claim
120 words
A communication apparatus comprising: receiving means for receiving a signal including a signal from a partner station; conversion means for converting the signal received by said receiving means in accordance with a diffusion code, wherein the diffusion code is determined in accordance with a diffusion code used in transmission by the partner station; control signal generating means coupled to the conversion means for generating a control signal corresponding to an output level of said conversion means; transmission means for transmitting data to the partner station; and transmission control means coupled to the transmission means for controlling a transmission level of a signal output of said transmission means in accordance with the control signal generated by said control signal generating means.
Claim 3
Dependent Claim
15 words
A communication apparatus according to claim 1, wherein said receiving means receives a radio signal.
Claim 4
Dependent Claim
15 words
A communication apparatus according to claim 1, wherein said transmission means transmits a radio signal.
Claim 5
Dependent Claim
48 words
A communication apparatus according to claim 1, wherein said transmission control means controls the transmission level of the signal output of said transmission means such that the transmission level of the signal output of said transmission means is inversely proportional to the output level of said conversion means.
Claim 6
Dependent Claim
49 words
A communication apparatus according to claim 1, further comprising: demodulation means for demodulating the signal received by said receiving means; and demodulation control means for controlling the level of the demodulated signal of said demodulation means in accordance with the control signal generated by said control signal generating means.
Claim 7
Dependent Claim
27 words
A communication apparatus according to claim 5, wherein said demodulation control means controls said demodulation means to keep the level of the demodulated signal output therefrom constant.
Claim 8
Dependent Claim
46 words
A communication apparatus according to claim 1, further comprising: amplifier means for amplifying the signal received by said receiving means; and amplification control means for controlling an amplification factor of said amplifier means in accordance with the control signal generated by said control signal generating means.
Claim 9
Dependent Claim
27 words
A communication apparatus according to claim 7, wherein said amplification control means controls the amplification factor of said amplifier means to keep the output level thereof constant.
Claim 10
Dependent Claim
30 words
A communication apparatus according to claim 1, wherein said transmission means includes transmission data input means and transmits the data input by said transmission data input means after spectrum diffusion.
Claim 11
Dependent Claim
15 words
A communication apparatus according to claim 1, wherein said receiving means receives a spectrum-diffused signal.
Claim 12
Dependent Claim
99 words
A communication system for allowing a plurality of sub-stations to communicate with each other through a main station, each of said sub-stations comprising: data transmitting means for transmitting data to the main station; and control means coupled to the data transmitting means for controlling a data transmission level of data transmitted from said data transmitting means to the main station at the start of data transmission to the main station in accordance with a level of a pilot signal received from said main station before the start of data transmission from said data transmission means to the main station.
Claim 13
Dependent Claim
99 words
A communication system for allowing a plurality of sub-stations to communicate with each other through a main station, each of said sub-stations comprising: data transmitting means for transmitting data to the main station; and control means coupled to the data transmitting means for controlling a data transmission level of data transmitted from said data transmitting means to the main station at the start of data transmission to the main station in accordance with a level of a pilot signal received from said main station before the start of data transmission from said data transmission means to the main station.
Claim 14
Dependent Claim
16 words
A communication apparatus according to claim 11, wherein said data transmission means transmits spectrum diffused data.
Claim 15
Dependent Claim
34 words
A communication apparatus according to claim 11, wherein said control means receives a pilot signal from said main station, said pilot signal being a signal converted on the basis of a pilot diffusion code.
Claim 16
Dependent Claim
60 words
A communication apparatus according to claim 13, wherein said control means comprising receiving means for receiving a signal, converting means for converting the signal received by said receiving means in accordance with the pilot diffusion signal and level control means for controlling a transmission level of said data transmission means in accordance with an output level of said converting means.
Claim 17
Dependent Claim
29 words
A communication apparatus according to claim 11, wherein said control means controls the transmission level of said data transmission means to be inversely proportional to the received pilot signal.
Claim 18
Dependent Claim
15 words
A system according to claim 11, wherein said main station transmits the pilot signal repeatedly.
Claim 19
Dependent Claim
111 words
A spectrum diffusion communication system for allowing a plurality of sub-stations to communicate with each other through a main station, each of said sub-stations comprising: data transmitting means for transmitting spectrum diffusion data to the main station; and control means coupled to the data transmitting means for controlling a transmission level of the spectrum diffusion data transmitted by said data transmitting means to the main station at the start of transmission of spectrum diffusion data to the main station in accordance with a level of a pilot signal received from the main station before the start of transmission of spectrum diffusion data from the data transmitting means to the main station.
Claim 20
Dependent Claim
111 words
A spectrum diffusion communication system for allowing a plurality of sub-stations to communicate with each other through a main station, each of said sub-stations comprising: data transmitting means for transmitting spectrum diffusion data to the main station; and control means coupled to the data transmitting means for controlling a transmission level of the spectrum diffusion data transmitted by said data transmitting means to the main station at the start of transmission of spectrum diffusion data to the main station in accordance with a level of a pilot signal received from the main station before the start of transmission of spectrum diffusion data from the data transmitting means to the main station.
Claim 21
Dependent Claim
34 words
A communication apparatus according to claim 17, wherein said control means receives a pilot signal from a main station, said pilot signal being a signal converted on the basis of a pilot diffusion code.
Claim 22
Dependent Claim
60 words
A communication apparatus according to claim 18, wherein said control means comprises receiving means for receiving a signal, converting means for converting the signal received by said receiving means in accordance with the pilot diffusion signal and level control means for controlling a transmission level of said data transmission means in accordance with an output level of said converting means.
Claim 23
Dependent Claim
29 words
A communication apparatus according to claim 17, wherein said control means controls the transmission level of said data transmission means to be inversely proportional to the received pilot signal.
Claim 24
Dependent Claim
15 words
A system according to claim 17, wherein said main station transmits the pilot signal repeatedly.
Claim 25
Dependent Claim
115 words
A communication apparatus comprising: receiving means for receiving a signal including a signal from a partner station through first and second channels, wherein said signal is a spectrum-diffused signal and diffusion codes are different for the first channel and the second channel; demodulating means coupled to the receiving means for demodulating the signal received from the partner station through the first channel to obtain original data; detecting means coupled to the receiving means, for detecting a level of the signal from the partner station received through the second channel; and transmitting means coupled to the detecting means for transmitting a signal with a signal level corresponding to the signal level detected by said detecting means.
Claim 26
Dependent Claim
115 words
A communication apparatus comprising: receiving means for receiving a signal including a signal from a partner station through first and second channels, wherein said signal is a spectrum-diffused signal and diffusion codes are different for the first channel and the second channel; demodulating means coupled to the receiving means for demodulating the signal received from the partner station through the first channel to obtain original data; detecting means coupled to the receiving means, for detecting a level of the signal from the partner station received through the second channel; and transmitting means coupled to the detecting means for transmitting a signal with a signal level corresponding to the signal level detected by said detecting means.
Claim 27
Dependent Claim
15 words
An apparatus according to claim 22, wherein said transmitting means transmits a spectrum diffused signal.
Claim 28
Dependent Claim
31 words
An apparatus according to claim 22, wherein said transmitting means comprises control means for controlling a transmission level to be in inverse proportion to the level detected by said detecting means.
Claim 29
Dependent Claim
27 words
An apparatus according to claim 22, wherein said demodulating means demodulates received data amplified according to a level detected by said detecting means to obtain original data.
Claim 30
Dependent Claim
83 words
A communication apparatus, comprising: transmitting means for transmitting data to a main station; receiving means for receiving a reference signal from the main station; and control means coupled to the receiving means for controlling a transmission level of the data transmitted by said transmitting means to the main station at the start of data transmission to the main station in accordance with a reception level of the reference signal before the start of data transmission from said transmitting means to the main station.
Claim 31
Dependent Claim
83 words
A communication apparatus, comprising: transmitting means for transmitting data to a main station; receiving means for receiving a reference signal from the main station; and control means coupled to the receiving means for controlling a transmission level of the data transmitted by said transmitting means to the main station at the start of data transmission to the main station in accordance with a reception level of the reference signal before the start of data transmission from said transmitting means to the main station.
Claim 32
Dependent Claim
22 words
An apparatus according to claim 26, wherein said receiving means comprising demodulating means for demodulating an information signal from the main station.
Claim 33
Dependent Claim
28 words
An apparatus according to claim 27, wherein said demodulating means comprises amplifying means for amplifying an information signal in accordance with a reception level of the reference signal.
Claim 34
Dependent Claim
31 words
An apparatus according to claim 26, wherein said control means controls a transmission level of said transmission means to be in inverse proportion to a reception level of the reference signal.
Claim 35
Dependent Claim
13 words
An apparatus according to claim 26, wherein said transmission means transmits spectrum-diffused data.
Claim 36
Dependent Claim
14 words
An apparatus according to claim 26, wherein said receiving means receives a spectrum-diffused signal.
Claim 37
Dependent Claim
15 words
An apparatus according to claim 26, wherein the main station transmits the reference signal repeatedly.
References Cited (Backward Citations)
US2678998A
Cited
US2896073A
Cited
US3315164A
Cited
US4641322A
Cited
US4613990A
Cited
US4868795A
Cited
EP0230691A1
Cited
US4870698A
Cited
US4958359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |