Patent ID: 9742477
Date: 2017-08-22
CPC Classifications: H04B

Claim:
1. A data transmission method for a multi-antenna system, comprising: performing first precoding processing on to-be-sent data in a first antenna direction of a multi-antenna system to generate first data, the performing the first precoding processing comprising mapping at least a portion of the to-be-sent data to first mapping data at first data layers, wherein the first antenna direction comprises at least two antennas configured to transmit or receive in the first antenna direction; performing second precoding processing on the first data in a second antenna direction of the multi-antenna system to generate second data, wherein the second antenna direction comprises at least two antennas configured to transmit or receive in the second antenna direction; and sending the second data to a receive node through each antenna port of the multi-antenna system; wherein, when the first precoding processing is first transmit diversity processing, the second precoding processing is at least one of second transmit diversity processing or second transmit spatial multiplexing processing; and wherein, when the first precoding processing is first transmit spatial multiplexing processing, the second precoding processing is second transmit diversity processing.