A universal interpretation of receive diversity gain in MIMO systems over flat channels

Author

Ohno, Shuichi ; Teo, Kok Ann Donny

Author_Institution

Dept. of Artificial Complex Syst. Eng., Hiroshima Univ., Higashi-Hiroshima, Japan

fYear

2006

fDate

4-8 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

We present universal bit-error rate (BER) performance ordering for different receive antenna sizes in Multiple-Input Multiple-Output (MIMO) wireless systems with linear equalizations, which hold for all SNR. We show that when the number of transmit antennas is fixed, BER of each symbol degrades with a decrease in the number of receive antennas even if the received SNR is kept constant. This is due to the convexity property of the BER functions. Then for any i.i.d. channels, we show that the BER averaged over random channels also degrades with a decrease in the number of receive antennas. These highlight the advantage and the limit of MIMO with linear equalizations.

Keywords

MIMO communication; diversity reception; equalisers; error statistics; linear antennas; receiving antennas; wireless channels; BER perfonnance; MIMO systems; SNR; bit-error rate perfonnance; convexity property; flat channels; linear equalization; multiple input multiple-output wireless systems; receive diversity gain; receiving antennas; Abstracts; Antennas; Artificial neural networks; Diversity methods; MIMO; Numerical models; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2006 14th European

Conference_Location

Florence

ISSN

2219-5491

Type

conf

Filename

7071222