Patent ID: 8189498
Filing Date: 2012-05-29
Classification: H04B

Abstract:
1. A method for multi-user beamforming based on a frequency division duplex system comprising: when two or more user terminals are at respective angles of arrival (AOAs), determining a transmit weight of a downlink signal of each user terminal by using a null-widening algorithm, and storing the transmit weight in a network side; and the network side grouping the user terminals based on AOA information reported by the user terminals, selecting a corresponding transmit weight for the downlink signal of each user terminal in each group based on the AOA information of each user terminal in the group, and transmitting the selected transmit weight multiplied with a downlink data stream of the user terminal corresponding to the transmit weight; the AOA is a quantified value; an identified binary digit is allocated to the quantified value of AOA, and the quantified value of each AOA corresponds to an identifier composed of the identified binary digit; wherein the user terminal, after measuring an angle value of AOA, selects the nearest quantified value of AOA as a measurement value, and reports the identifier corresponding to the measurement value; and the identifiers to which the AOAs of all user terminals in each group correspond feed back to the user terminal by the network side.