Radio communication apparatus
First Claim
1. A radio communication apparatus having a transmitting device and a receiving device, said transmitting device comprising:
- a first modulator for modulating a first signal according to a first frequency and outputting a first digital modulation signal;
a second modulator for modulating a second signal according to a second frequency and outputting a second modulation signal; and
a transmitter for transmitting said first modulation signal and said second modulation signal,said receiving device comprising;
a receiver for receiving said first modulation signal and said second modulation signal;
a first demodulator for detecting said received first digital modulation signal;
a clock regenerator for regenerating a clock from a detection output from said first demodulator;
an amplitude sampler for sampling the amplitude of said received first digital modulation signal at a timing of said regenerated clock;
a second demodulator for controlling a frequency of said received second modulation signal and performing demodulation; and
a gain controller for executing gain control of said second demodulator according to output from said amplitude sampler.
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Accused Products
Abstract
A radio communication apparatus comprises a first/second modulator for modulating a first/second signal according to a first/second frequency, a first demodulator for detecting the received first modulation signal and regenerating the carrier, a clock regenerator for regenerating a clock from the detection output from the first demodulator, an amplitude sampler for sampling the amplitude of the received first modulation signal according to the regenerated clock, a second demodulator for controlling the frequency of the received second modulation signal and executing demodulation for the signal, and a gain controller for executing gain control for the output from the second demodulator according to the output from the amplitude sampler.
118 Citations
16 Claims
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1. A radio communication apparatus having a transmitting device and a receiving device, said transmitting device comprising:
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a first modulator for modulating a first signal according to a first frequency and outputting a first digital modulation signal; a second modulator for modulating a second signal according to a second frequency and outputting a second modulation signal; and a transmitter for transmitting said first modulation signal and said second modulation signal, said receiving device comprising; a receiver for receiving said first modulation signal and said second modulation signal; a first demodulator for detecting said received first digital modulation signal; a clock regenerator for regenerating a clock from a detection output from said first demodulator; an amplitude sampler for sampling the amplitude of said received first digital modulation signal at a timing of said regenerated clock; a second demodulator for controlling a frequency of said received second modulation signal and performing demodulation; and a gain controller for executing gain control of said second demodulator according to output from said amplitude sampler. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a radio communication system having a transmitter for transmitting a first frequency signal modulated according to a first information signal and a second frequency signal modulated according to a second information signal, a receiver, comprising:
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a first demodulator responsive to said first frequency signal for regenerating a carrier signal and outputting a detection output. a first discriminator responsive to the detection output of said first demodulator for detecting said first information signal, a clock regenerator responsive to the detection output of said first demodulator for detecting a clock signal, a second demodulator responsive to said second frequency signal and said carrier signal for generating an intermediate signal representing said second information signal, and a second discriminator responsive to said first frequency signal, said intermediate signal and said clock signal for detecting said second information signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. Method of radio communication using a combination of a first frequency signal modulated according to a first information signal and a second frequency signal modulated according to a second information signal, comprising the steps of:
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receiving said combination to detect said first frequency signal and said second frequency signal, demodulating said received first frequency signal to extract a carrier and to detect said first information signal, processing said received second frequency signal, together with said carrier, to generate an intermediate signal representing said second information signal, and processing said received first frequency signal, together with said intermediate signal, to detect said second information signal. - View Dependent Claims (16)
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Specification