Patent ID: 8270527

Claim:
A method of radio data emission, by an emitter including at least one group of four transmit antennas comprising: generating a first signal, S, to be transmitted on a first antenna being considered in the frequency domain as resulting from a discrete Fourier transform (DFT) of size M, M being an integer, leading to emission of a symbol on each of M sub carriers on the first antenna, wherein a function SC(p) is defined by S k Ts =(−1) k+1 S* (p−1−k)modM , for k=0 to M−1 and produces a second signal to be emitted on a second antenna Ts from the first signal S to be emitted on the first antenna, wherein p is a parameter between 0 and M−1 and k is an index for each sub carrier in the frequency domain, each group of four antennas defining two pairs of antennas; emitting on each antenna a signal such that: for each group, any incomplete group comprising from one to three antennas is treated as a complete group in which some antennas are suppressed afterward; signals emitted on the antennas of each pair in each group are related by a first relationship the function SC(p); a signal emitted on one of the antennas of a first pair and a signal emitted on one of a antennas of a second pair is related by a second relation that preserves a single carrier property; and a signal emitted on one of the antennas of a first group of four antennas and a signal emitted on one antenna of any other group is related by a third relation that preserves the single carrier property.