Patent ID: 9197302
Filing Date: 2015-11-24
Classification: H04B,H04J,H04L

Abstract:
1. A multiple-input multiple-output (MIMO) communication method for a transmitter including N transmitter antennas and a receiver including M receiver antennas, where N and M are integers greater than or equal to two, the communication method comprising: transmitting, by each transmitter antenna, a digital sequence including a first portion and a second portion, wherein the first portion is multiplied by a first type of orthogonal code and the second portion is multiplied by a predetermined coefficient and a second type of orthogonal code, the transmitted digital sequence being multiplied by a pre-coding coefficient that is determined by the receiver; demodulating, by processing circuitry, the received digital sequences of each receiver antenna by multiplying the received digital sequences by the first type of orthogonal code and the second type of orthogonal code; first determining based on the demodulated digital sequences of the receiver antennas, a receiver antenna that has a highest signal-to-noise ratio; and notifying the transmitter of the pre-coding coefficient corresponding to the determined receiver antenna.