Patent ID: 9729370
Date: 2017-08-08
CPC Classifications: H04L

Claim:
1. A method for transmitting data by a transmitter, the method comprising: receiving, from a receiver, a precoding matrix index (PMI) included in downlink control information (DCI) on a physical downlink control channel (PDCCH), the PMI being determined based on an estimated channel; identifying a selected mapping algorithm (SLM) sequence subset corresponding to the PMI from an SLM sequence set, the SLM sequence subset including a plurality of SLM sequences; applying the plurality of SLM sequences included in the SLM sequence subset to data; selecting an SLM sequence having a lowest peak to average power ratio (PAPR) value in application to the data from the SLM sequence subset; and transmitting an index of the selected SLM sequence and the data to which the selected SLM sequence is applied, wherein the SLM sequence subset is determined based on the PMI from the SLM sequence set, wherein an amount of an index indicating an SLM sequence included in the SLM sequence subset is less than an amount of an index indicating an SLM sequence included in the SLM sequence set, and wherein the SLM sequence subset is changed if a codebook including a precoding matrix indicated by the PMI, which is shared by the transmitter and the receiver, is changed.