TRANSMISSION METHOD, TRANSMISSION DEVICE, RECEPTION METHOD, AND RECEPTION DEVICE

摘要

Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.

主权项

1. A transmission method comprising:
an encoding step of generating an encoded block using a predetermined error correction block encoding method; a generation step of generating a first transmission signal z1 and a second transmission signal z2 by performing, for each of a plurality of slots, a precoding process on a first modulated signal s1 and a second modulated signal s2 that have been generated from the encoded block; and a transmission step of transmitting the first transmission signal z1 and the second transmission signal z2 from a first antenna and a second antenna, respectively, in the same frequency at the same time, wherein the generation step further selects one matrix from among N matrices F[i], where i is an integer no less than 0 and no more than N−1, and N is an integer 3 or greater, by hopping between the matrices over each of the plurality of slots, the N matrices F[i] each defining the precoding process, and generates the transmission signal z1 and the transmission signal z2 by performing, for each of the plurality of slots, a precoding process corresponding to the selected matrix F[i] on the first modulated signal s1 and the second modulated signal s2, the first transmission signal z1 and the second transmission signal z2 satisfy (z1, z2)T=F[i](s1, 52)T, the N matrices F[i] satisfyF[i]=1α2+1(jθ11(i)α×j(θ11(i)+λ)α×jθ21(i)j(θ21(i)+λ+π)) where λ represents an arbitrary angle, and α represents a positive real number excluding 1, θ11(i) and θ21(i) satisfy
ej(θ11(x)−θ21(x))≠ej(θ11(y)−θ21(y)) for ∀x, ∀y (x≠y;x,y=0, 1, 2, . . . , N−2, N−1), and the generation step performs the generation corresponding to the encoded block by selecting each of the N matrices F[i] the same number of times.