PRECODING METHOD, PRECODING DEVICE

摘要

Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.

主权项

1. A transmission method for generating a plurality of physical layer pipes (PLPs) and transmitting the plurality of PLPs from a plurality of antennas in the same frequency at the same time, the transmission method comprising, in the generation of the plurality of PLPs:
generating the plurality of PLPs, the plurality of PLPs each including a plurality of modulated symbols; selecting one matrix from among N matrices F[i] for each of a plurality of symbols by hopping between the matrices, where i is an integer no less than 0 and no more than N−1, and N is an integer 3 or greater, the N matrices F[i] each defining a precoding process that is performed on a plurality of baseband symbols; and generating first precoded signal z1(p) and second precoded signal z2(p) by precoding first baseband symbols s1(p) and second baseband symbols s2(p) by using the selected one of the N matrices F[i], both the first baseband symbols s1(p) and the second baseband symbols s2(p) being symbols included in a p-th one of the PLPs, p being an integer 1 or greater and no greater than q, q being an integer 2 or greater, wherein the first precoded signal z1(p) and the second precoded signal z2(p) satisfy:
(z1(p), z2(p))T=F[i](s1(p), s2(p))T, the N matrices F[i] satisfy:F[i]=1α2+1(jθ11(i)α×j(θ11(i)+λ)α×jθ21(i)j(θ21(i)+λ+π)) where λ represents an arbitrary angle, a represents a positive real number, and θ11(i) and θ21(i) satisfy:
ej(θ11(x)−θ21(x))≠ej(θ11(y)−θ21(y)) where x and y are any integers no less than 0 and no more than N−1 and satisfy x≠y, and a same one of the N matrices F[i] is used for a first symbol of the first baseband symbols s1(p) and a first symbol of the second baseband symbols s2(p).