Patent ID: 9191079
Filing Date: 2015-11-17
Classification: H04B

Abstract:
1. A wireless communication system, comprising: a plurality of transmitting stations each including a transmit antenna array, the plurality of transmitting stations transmitting training sequences via the respective transmit antenna arrays in the same period of time; a plurality of receiving stations corresponding to the plurality of transmitting stations respectively and each including a receive antenna array, each of the plurality of receiving stations receiving the respective training sequences transmitted by the plurality of transmitting stations via the respective receive antenna array and acquiring channel information regarding channel conditions of the respective links between the receiving station and the respective ones of the plurality of transmitting stations, the channel information being used to determine at least one of optimized transmit antenna weight vectors of the transmit antenna arrays of the plurality of transmitting stations and optimized receive antenna weight vectors of the receive antenna arrays of the plurality of receiving stations; and a coordinator, which receives the channel information from the plurality of receiving stations as feedback, and evaluates link qualities of the respective links between the plurality of transmitting stations and the plurality of receiving stations based on the channel information fed back from the plurality of receiving stations to determine whether it is necessary to conduct re-training or not, and wherein the plurality of transmitting stations transmit training sequences via the respective transmit antenna arrays while switching or fixing the respective transmit antenna weight vectors in the same period of time.