AGC and Quantization Effects in a Zero-Forcing MIMO Wireless System

Author

Murray, Boyd M. ; Collings, Lain B.

Author_Institution

CSIRO ICT Centre, Sydney, NSW

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1802

Lastpage

1806

Abstract

This paper considers automatic gain control (AGC) and quantization for multiple-input multiple-output (MIMO) wireless systems. We examine the effect of clipping and quantization on capacity and bit error rate (BER). We find that even quite low resolution quantizers can perform close to the capacity of ideal unquantized systems. Results are presented for BPSK and M-ary QAM, and for 2times2, 3times3, and 4times4 MIMO configurations. We find that in each case less than 6 quantizer bits are required to achieve 98% of unquantized capacity for SNRs above 15 dB

Keywords

MIMO systems; automatic gain control; error statistics; phase shift keying; quadrature amplitude modulation; radiocommunication; telecommunication control; AGC; BER; BPSK; M-ary QAM; automatic gain control; bit error rate; multiple-input multiple-output; quantization effects; wireless system; zero-forcing MIMO; Australia; Binary phase shift keying; Bit error rate; Covariance matrix; Gain control; Gaussian noise; MIMO; Quadrature amplitude modulation; Quantization; Receiving antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683157

Filename

1683157