Title :
On the Impact of PDF-matched Quantization on Orthogonal Random Beamforming
Author :
Antón-Haro, Carles
Author_Institution :
Centre Tecnologic de Telecomunicacions de Catalunya, Barcelona
fDate :
4/1/2007 12:00:00 AM
Abstract :
Orthogonal random beamforming (ORB) schemes provide multi-user diversity and spatial multiplexing gains by exclusively using partial channel state information (CSI) at the transmitter. In this paper, we explore the impact of CSI quantization on the performance of ORB. By resorting to a dynamic programming formulation, we identify the optimal (i.e. pdf-matched) quantizer for which the sum-rate distortion is minimized. Performance is assessed by means of computer simulations and compared with that of a uniform quantizer
Keywords :
array signal processing; dynamic programming; quantisation (signal); rate distortion theory; CSI; ORB scheme; PDF-matched quantization; channel state information; computer simulation; dynamic programming formulation; orthogonal random beamforming; sum-rate distortion; AWGN; Array signal processing; Broadcasting; Channel state information; Dynamic programming; MIMO; Multiuser detection; Quantization; Signal to noise ratio; Transmitters;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOM.2007.348290
