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1. (WO2017041463) SYSTEM AND METHOD FOR TRELLIS CODED QUANTIZATION BASED CHANNEL FEEDBACK

Pub. No.:    WO/2017/041463    International Application No.:    PCT/CN2016/076094
Publication Date: Fri Mar 17 00:59:59 CET 2017 International Filing Date: Fri Mar 11 00:59:59 CET 2016
IPC: H04W 24/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: SUH, Jung Hoon
ABOUL-MAGD, Osama
Title: SYSTEM AND METHOD FOR TRELLIS CODED QUANTIZATION BASED CHANNEL FEEDBACK
Abstract:
A method and apparatus for feeding back channel information from a first device to a second device in a wireless communication system are provided. The first device estimates channel parameters based on a signal received from the second device, and determines a set of angle parameters indicative of an angle representation of a V matrix, which is the right singular matrix of a singular value decomposition of an estimated channel matrix H. The angle parameters can be derived according to a Givens rotation method or Cosine-Sine decomposition. The first device applies a Trellis Coded Quantization (TCQ) scheme to map the angle parameters to a trellis. A Viterbi algorithm applied to the trellis generates quantized angle parameters which are transmitted to the second device.