Title :
Semi-orthogonal precoder design with vector quantized channel information feedback
Author_Institution :
Fac. of Inf. Eng. & Autom., Kunming Univ. of Sci. & Technol., Kunming
Abstract :
This paper deals with the sum-rate performance in the broadcasting channel of a decentralized multiuser multi-antenna system. With the assumption of limited channel state information available at the base station and a large number of single antenna decentralized users in a cell, we propose a Semi-orthogonal precoding method with a total feedback rate constraint, and analyze its the sum-rate performance. A lower bound to the sum-rate of broadcast channels with quantized channel direction information and channel quality information is obtained. It can be used to evaluate the performance of broadcast channels with finite-rate feedback of channel state information and semi-orthogonal user selection. Numerical examples show that our analytical results agree with Monte Carlo simulations.
Keywords :
broadcast antennas; broadcast channels; multi-access systems; multiuser channels; precoding; vector quantisation; broadcast channel; broadcasting channel; channel quality information; decentralized multiuser multiantenna system; finite-rate feedback; limited channel state information; lower bound; quantized channel direction information; semiorthogonal precoder design; semiorthogonal user selection; single antenna decentralized users; sum-rate performance; total feedback rate constraint; vector quantized channel information feedback; Antenna feeds; Base stations; Broadcasting; Channel state information; H infinity control; MIMO; Quantization; Signal to noise ratio; State feedback; Transmitting antennas; Channel state information; MIMO precoder; Sum-rate; Vector quantization;
Conference_Titel :
Control Conference, 2008. CCC 2008. 27th Chinese
Conference_Location :
Kunming
Print_ISBN :
978-7-900719-70-6
Electronic_ISBN :
978-7-900719-70-6
DOI :
10.1109/CHICC.2008.4605478
