Radio communication method, radio transmission apparatus and receiving apparatus
First Claim
Patent Images
1. A radio communication method comprising:
- generating a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted, the first transmit RF signal and the second transmit RF signal respectively having a power spectrum in symmetric shape in the frequency domain;
transmitting the first transmit RF signal and the second transmit RF signal at a different time from a single transmit antenna;
receiving the first transmit RF signal and the second transmit RF signal to generate a first received RF signal and a second received RF signal; and
reproducing the data signal only from the first received RF signal and the second received RF signal,wherein the generating the first transmit RF signal and the second transmit RF signal comprises;
modulating the data signal to generate a first transmit baseband signal which has a first power spectrum;
subjecting the first transmit baseband signal to a first computation to generate a second transmit baseband signal which has a power spectrum forming a symmetric shape with respect to the first power spectrum in the frequency domain; and
subjecting the first transmit baseband signal and the second transmit baseband signal to an RF process to generate the first transmit RF signal and the second transmit RF signal.
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Abstract
A radio communication method includes generating a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted. Each of the first and second transmit RF signals have a power spectrum in symmetric shape in the frequency domain. The first transmit RF signal and the second transmit RF signal are transmitted at a different time. The first transmit RF signal and the second transmit RF signal are received to generate a first received RF signal and a second received RF signal. The data signal from the first received RF signal and the second received RF signal are reproduced.
15 Citations
13 Claims
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1. A radio communication method comprising:
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generating a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted, the first transmit RF signal and the second transmit RF signal respectively having a power spectrum in symmetric shape in the frequency domain; transmitting the first transmit RF signal and the second transmit RF signal at a different time from a single transmit antenna; receiving the first transmit RF signal and the second transmit RF signal to generate a first received RF signal and a second received RF signal; and reproducing the data signal only from the first received RF signal and the second received RF signal, wherein the generating the first transmit RF signal and the second transmit RF signal comprises; modulating the data signal to generate a first transmit baseband signal which has a first power spectrum; subjecting the first transmit baseband signal to a first computation to generate a second transmit baseband signal which has a power spectrum forming a symmetric shape with respect to the first power spectrum in the frequency domain; and subjecting the first transmit baseband signal and the second transmit baseband signal to an RF process to generate the first transmit RF signal and the second transmit RF signal.
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2. A transmission apparatus comprising:
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a transmitter configured to generate a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted, and to output them at a different time, the first transmit RF signal and the second transmit RF signal respectively having a power spectrum in a symmetric shape in the frequency domain; and a single transmit antenna to transmit the first transmit RF signal and the second transmit RF signal, wherein the transmitter comprises; a modulator configured to modulate the data signal to generate a first transmit baseband signal which has a first power spectrum; a first computing unit configured to subject the first transmit baseband signal to a first computation to generate a second transmit baseband signal which has a power spectrum forming a symmetric shape with respect to the first power spectrum in the frequency domain; and an RF transmission unit configured to subject the first transmit baseband signal and the second transmit baseband signal to an RF process to generate the first transmit RF signal and the second transmit RF signal, wherein the data signal is reproduced only from the first RF signal and the second RF signal in a receiver. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A transmission apparatus comprising:
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a transmitter configured to generate a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted, and to output them at a different time, the first transmit RF signal and the second transmit RF signal respectively having a power spectrum in a symmetric shape in the frequency domain; and a single transmit antenna to transmit the first transmit RF signal and the second transmit RF signal, wherein the transmitter comprises; a modulator configured to modulate the data signal to generate a modulated signal; a first frequency converter configured to subject the modulated signal to a frequency conversion in a first frequency shift amount and a first frequency shift direction to generate a first transmit baseband signal; a first computing unit configured to subject the first transmit baseband signal to a first computation to generate a second transmit baseband signal which has a power spectrum forming a symmetric shape with respect to the power spectrum in the frequency domain; and an RF transmission unit configured to subject the first transmit baseband signal and the second transmit baseband signal to an RF process to generate the first transmit RF signal and the second transmit RF signal, wherein the data signal is reproduced only from the first RF signal and the second RF signal in a receiver. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification