Pre-coding method and pre-coding device

摘要

Disclosed is a precoding method comprising the steps of, generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

主权项

1. A transmission method comprising:
generating a first modulated signal s1 with use of a first modulation scheme; generating a second modulated signal s2 with use of a second modulation scheme, the second modulation scheme being lower in modulation level than the first modulation scheme; generating a first multiplication signal s1′ by multiplying the first modulated signal s1 by a first coefficient; generating a second multiplication signal s2′ by multiplying the second modulated signal s2 by a second coefficient, the second coefficient being less than the first coefficient; and transmitting a first transmission signal that is based on the first multiplication signal s1′ and a second transmission signal that is based on the second multiplication signal s2′ at the same time at the same frequency,
wherein the first modulated signal s1 is generated from a first coded block with use of the first modulation scheme, the first coded block being generated from a transmission signal with use of a scheme selected from among a plurality of error correction block coding schemes, and the second modulated signal s2 is generated from the first coded block with use of the second modulation scheme.