A method for improving the performance of successive cancellation in mobile spread MIMO OFDM

Author

Thomas, Timothy A. ; Vook, Frederick W.

Author_Institution

Commun. Syst. Res. Lab., Motorola Labs., Schaumburg, IL, USA

Volume

1

fYear

2002

fDate

2002

Firstpage

18

Abstract

Bell Labs layered space-time (BLAST) promises to increase greatly the capacity of future broadband mobile communications. However, in MIMO communication systems, the decoded BER performance of successive cancellation receivers is limited by the performance of the stream with the highest mean squared error. The paper presents a novel method to determine the different power weighting to be applied by the transmitter to each BLAST data stream in frequency-selective communications to improve the performance of a successive cancellation receiver. In addition, the new method predetermines the successive cancellation decoding order, thus simplifying the receiver. Simulation results for a spread OFDM system show up to a 5.0 dB improvement in frequency-selective channels over BLAST with equal power on each stream.

Keywords

MIMO systems; OFDM modulation; broadband networks; code division multiple access; decoding; error statistics; mean square error methods; mobile radio; radio receivers; telecommunication channels; BER performance; BLAST; Bell Labs layered space-time; MIMO OFDM; broadband mobile communications; frequency-selective channels; mean squared error; multi-carrier CDMA; spread OFDM; successive cancellation decoding; successive cancellation receivers; transmitter; Bit error rate; Broadband communication; Decoding; Feedback; Laboratories; MIMO; OFDM; Time domain analysis; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th

ISSN

1090-3038

Print_ISBN

0-7803-7467-3

Type

conf

DOI

10.1109/VETECF.2002.1040293

Filename

1040293