Patent ID: 8792573
Filing Date: 2014-07-29
Classification: H04B,H04W

Abstract:
1. A method for data transmission based on distributed discrete power control among a plurality of transmitting entities in a closed loop cooperative multi-user multi-input multi-output (MIMO) system, the method comprising: coding and modulating, by a transmitting entity among the plurality of transmitting entities, a signal to be transmitted; receiving, by the transmitting entity, feedback information from a terminal among a plurality of terminals grouped for multi-user transmission; sharing, by the transmitting entity, a pre-coding index with the plurality of terminals, based on the feedback information; determining, by the transmitting entity, a plurality of distributed discrete power control levels for the plurality of transmitting entities based on the feedback information, wherein each of the plurality of distributed discrete power control levels is for use by each respective transmitting entity of the plurality of transmitting entities for a cooperative transmission; and transmitting, by the transmitting entity to the terminal, the signal according to one of the determined plurality of distributed discrete power control levels, wherein the plurality of distributed discrete power control levels are determined by performing a Hadamard product with respect to a transmission signal and a distributed discrete power control matrix.