Patent ID: 9496986
Filing Date: 2016-11-15
CPC Classification: H04B,H04L

Claim Text:
1. A layer mapping method for spatial multiplexing in a Multi-Input Multi-Output (MIMO) system, the layer mapping method comprising: generating codewords comprising a first codeword and a second codeword; mapping the codewords to two or more layers according to one mapping combination from among a plurality of mapping combinations; and precoding the two or more layers to be transmitted through multiple antennas, wherein the two or more layers are mapped to the multiple antennas based on a precoding matrix used for the precoding, wherein the plurality of mapping combinations comprise first mapping combinations for one codeword and second mapping combinations for multiple codewords, wherein the second mapping combinations for multiple codewords are used for transmitting the generated first codeword and second codeword, and wherein the first mapping combinations comprise all possible mapping combinations for retransmitting one of the first codeword and the second codeword when there is an indication that the one of the first codeword and the second codeword was not received.