Patent ID: 9628165
Date: 2017-04-18
CPC Classifications: H04B,H04J,H04L,H04W

Claim:
1. A transmission signal generating method comprising: applying precoding to a first modulated signal s1(i) and a second modulated signal s2(i) to generate a first precoded signal z′1(i) and a second precoded signal z′2(i), the first modulated signal s1(i) having been acquired by modulating, by a first modulation scheme at a modulation level denoted by a, data encoded by using a first error-correcting code of a first coding rate, the second modulated signal s2(i) having been acquired by modulating, by a second modulation scheme at a modulation level denoted by b, data encoded by using a second error-correcting code of a second coding rate, a and b being integers satisfying a<b, i being an integer more than 0; performing a phase change on at least one of the first precoded signal z′1(i) and the second precoded signal z′2(i) to generate a first transmission signal z1(i) and a second transmission signal z2(i); and outputting the first transmission signal z1(i) and the second transmission signal z2(i) respectively to be transmitted from a first antenna and a second antenna at the same time at the same frequency, the first transmission signal z1(i) and the second transmission signal z2(i) include respectively an information symbol regarding the first modulation scheme and the second modulation scheme, the precoding being represented by a precoding matrix where α=0, k being a real number greater than 0 and less than 2, k in the precoding matrix being changed each time at least one of the first modulation scheme, the second modulation scheme, the first error-correcting code, the second error-correcting code, the first coding rate, and the second coding rate is changed, and the transmission signal generating method further comprising: performing a power change involving multiplication by a weighting factor u