Signal generation method and signal generation device
First Claim
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1. A transmission method of a transmission system, the transmission system having a first transmitter and a second transmitter, the transmission method comprising:
- encoding input data to coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme;
modulating each of the coded blocks to a first modulated signal s1 and a second modulated signal s2;
applying precoding by a fixed matrix F to the first modulated signal s1 and the second modulated signal s2 to obtain a first pre-coded signal z1′ and
a second pre-coded signal z2′
, whereinthe matrix F is expressed as;
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Abstract
A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
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Citations
12 Claims
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1. A transmission method of a transmission system, the transmission system having a first transmitter and a second transmitter, the transmission method comprising:
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encoding input data to coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme; modulating each of the coded blocks to a first modulated signal s1 and a second modulated signal s2; applying precoding by a fixed matrix F to the first modulated signal s1 and the second modulated signal s2 to obtain a first pre-coded signal z1′ and
a second pre-coded signal z2′
, whereinthe matrix F is expressed as; - View Dependent Claims (2, 3)
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4. A transmission system comprising:
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a first transmitter; and a second transmitter, wherein both the first transmitter and the second transmitter are operable to; encode input data to coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme; modulate each of the coded blocks to a first modulated signal s1 and a second modulated signal s2; apply precoding by a fixed matrix F to the first modulated signal s1 and the second modulated signal s2 to obtain a first pre-coded signal z1′ and
a second pre-coded signal z2′
, whereinthe matrix F is expressed as; - View Dependent Claims (5, 6)
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7. A reception method of a reception apparatus, the method comprising:
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acquiring a reception signal obtained by receiving (i) a first transmission signal z1 transmitted from a first antenna of a first transmitter at a first period at a first frequency and a second transmission signal z2 transmitted from a second antenna of a second transmitter at the first period at the first frequency, or (ii) the first transmission signal z1 transmitted from the first antenna of the first transmitter at the first period at the first frequency and the second transmission signal z2 transmitted from a third antenna of the first transmitter at the first period at the first frequency, the first transmission signal z1 and the second transmission signal z2 having been generated through a predetermined generation process; and demodulating the reception signal to reception data, through a demodulation process corresponding to the predetermined generation process, wherein at least one of the acquiring and the demodulating is performed by the reception apparatus, and the predetermined generation process is a process of; encoding input data to coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme; modulating each of the coded blocks to a first modulated signal s1 and a second modulated signal s2; applying precoding by a fixed matrix F to the first modulated signal s1 and the second modulated signal s2 to obtain a first pre-coded signal z1′ and
a second pre-coded signal z2′
, whereinthe matrix F is expressed as; - View Dependent Claims (8, 9)
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10. A reception apparatus comprising:
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a memory; and control circuitry, wherein the control circuitry is operable to perform the steps of; acquiring a reception signal obtained by receiving (i) a first transmission signal z1 transmitted from a first antenna of a first transmitter at a first period at a first frequency and a second transmission signal z2 transmitted from a second antenna of a second transmitter at the first period at the first frequency, or (ii) the first transmission signal z1 transmitted from the first antenna of the first transmitter at the first period at the first frequency and the second transmission signal z2 transmitted from a third antenna of the first transmitter at the first period at the first frequency, the first transmission signal z1 and the second transmission signal z2 having been generated through a predetermined generation process; and demodulating the reception signal to reception data, through a demodulation process corresponding to the predetermined generation process, wherein at least one of the acquiring and the demodulating is performed by the control circuitry, and the predetermined generation process is a process of; encoding input data to coded blocks each made up of a plurality of bits by using a predetermined error correction block coding scheme; modulating each of the coded blocks to a first modulated signal s1 and a second modulated signal s2; applying precoding by a fixed matrix F to the first modulated signal s1 and the second modulated signal s2 to obtain a first pre-coded signal z1′ and
a second pre-coded signal z2′
, whereinthe matrix F is expressed as; - View Dependent Claims (11, 12)
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Specification