Patent ID: 9462590
Filing Date: 2016-10-04
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A transmitter, the transmitter comprising: a radio frequency (RF) unit for transmitting and receiving a radio signal; and a processor coupled to the RF unit, wherein the processor is configured for: generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to a plurality of layers; and transmitting the mapping symbols through a plurality of antennas, wherein when a number of the plurality of layers is larger than 4, at least one of the modulation symbols for the first codeword and the modulation symbols for the second codeword is mapped to at least 3 layers, and wherein when the number of the plurality of layers is 5, the modulation symbols for the first codeword are mapped to 2 layers and the modulation symbols for the second codeword are mapped to remaining 3 layers, and when the number of the plurality of layers is 6, the modulation symbols for the first codeword are mapped to 3 layers and the modulation symbols for the second codeword are mapped to remaining 3 layers, and when the number of the plurality of layers is 7, the modulation symbols for the first codeword are mapped to 3 layers and the modulation symbols for the second codeword are mapped to remaining 4 layers, and when the number of the plurality of layers is 8, the modulation symbols for the first codeword are mapped to 4 layers and the modulation symbols for the second codeword are mapped to remaining 4 layers.