Patent ID: 8290081
Filing Date: 2012-10-16
Classification: H04B,H04L

Abstract:
1. A transmission method suitable for a system with Nt transmit antennas and Nr receive antennas, where Nt and Nr are at least 1, a transmit antenna being separated from a receive antenna by a transmission sub-channel, implemented by Nt multiple-carrier transmitters each including a multiplexing and modulation module using N FFT orthogonal functions forming orthogonal symbols intended to be transmitted by the Nt transmit antennas TX 1 to TX Nt , the method including: a step of determining a basic training sequence from the position of Np pilot symbols in a time-frequency frame; a step of determining time replicas of the basic training sequence such that at least one time replica is time offset from the basic sequence, with K i ≧1 and at least one K i ≧2, where each K i is an integer representing a number of replicas of the basic training sequence, subject to the constraints that the extreme time offset between time replicas must be less than the number Np of pilot carriers and that the minimum time offset between time replicas of two training sequences is greater than or equal to the maximum spread of the delays of the sub-channels; and a step of determining a training sequence for each transmit antenna TX