Iterative bit & power allocation for V-BLAST based OFDM MIMO system in frequency selective fading channel

Author

Ng, Ka-Wai ; Cheng, Roger S. ; Murch, Ross D.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China

Volume

1

fYear

2002

fDate

17-21 Mar 2002

Firstpage

271

Abstract

This paper presents an iterative bit and power allocation algorithm for an OFDM multiple-input multiple-output (MIMO) system in frequency selective fading channels and uses V-BLAST as a detection algorithm. Assuming knowledge of the instantaneous channel gains for all spatial channels at all the subcarriers in the receiver, bit and power is assigned to each spatial channel to minimize the total transmission power for a fixed bit error rate (BER). We demonstrate by computer simulation that the proposed iterative bit and power allocation algorithm can significantly improve the system performance compared to the traditional V-BLAST and singular value decomposition (SVD) algorithm for an OFDM MIMO system in a frequency selective fading channel model.

Keywords

MIMO systems; OFDM modulation; error statistics; fading channels; iterative methods; radio receivers; signal detection; BER; OFDM MIMO system; V-BLAST; bit error rate; detection algorithm; frequency selective fading channel; iterative bit and power allocation algorithm; multiple-input multiple-output system; receiver; spatial channel; subcarriers; system performance; total transmission power; Bit error rate; Computer simulation; Detection algorithms; Fading; Iterative algorithms; MIMO; OFDM; Radio spectrum management; Singular value decomposition; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2002. WCNC2002. 2002 IEEE

Print_ISBN

0-7803-7376-6

Type

conf

DOI

10.1109/WCNC.2002.993505

Filename

993505