Title :
Quantized Principal Component Selection Precoding for Spatial Multiplexing with Limited Feedback
Author_Institution :
Dept. of Electron. Commun. Eng., Chungju Nat. Univ., Chungju
fDate :
5/1/2008 12:00:00 AM
Abstract :
In this paper, for spatial multiplexing with limited feedback, a quantized principal component selection (QPCS) precoding scheme is proposed that achieves comparable capacity to the closed-loop multiple-input multiple-output (MIMO) and furthermore adapts to various fading channel conditions without any additional feedback bits and transmit channel state information (CSI). We propose a systematic design method for a codebook consisting of a finite number of unitary matrices based on a maximizing minimum distance criterion in the one- dimensional angular domain and show that the method outperforms the Grassmannian subspace packing method in various fading channel conditions. The proposed QPCS precoding scheme allows for adjustment of the precoding matrix based on limited feedback information on the principal vectors approximating a MIMO channel in the angular domain according to various channel conditions. Furthermore, for practical implementation of the QPCS precoding scheme, we propose a structured precoder optimization procedure and show that the proposed procedure induces a negligible capacity loss compared with the exhaustive precoder optimization, even with considerably reduced complexity.
Keywords :
MIMO communication; fading channels; feedback; matrix algebra; multiplexing; Grassmannian subspace packing; MIMO channel; channel state information; closed-loop multiple-input multiple-output communication; codebook; fading channel; feedback; quantized principal component selection precoding; spatial multiplexing; unitary matrices; Antenna feeds; Array signal processing; Channel state information; Design methodology; Fading; MIMO; Signal to noise ratio; State feedback; Transmitters; Wireless networks;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2008.060228