Performance of Walsh-Hadamard transformed STBC OFDM system

Author

Yan, Wu ; Lei, Zhongding ; Sun, Sumei

Author_Institution

Inst. for Infocomm Res., Singapore, Singapore

Volume

2

fYear

2004

fDate

17-19 May 2004

Firstpage

738

Abstract

We study the performance of a Walsh-Hadamard transformed (WHT) space-time block coded (STBC) OFDM system, which we refer as the WHT-STBC-OFDM system. We show that, with the WHT transform, the error performance of the STBC coded OFDM system can be improved in terms of both bit error rate (BER) and packet error rate (PER) through simple linear detection. In (L. Zhongding et al., IEEE Vehic. Tech. Conf. vol.1, p.637-640, 2003), an iterative detection scheme is proposed for a WHT-OFDM system, where significant improvement can be achieved through only linear processing. We extent the algorithm to WHT-STBC-OFDM systems and show that the BER and PER can be further reduced through iterations.

Keywords

Hadamard transforms; OFDM modulation; Walsh functions; block codes; diversity reception; error statistics; fading channels; iterative decoding; space-time codes; BER; OFDM modulation; PER; STBC encoding; WHT; WHT STBC OFDM system; Walsh-Hadamard transform; bit error rate; frequency selective fading channels; iterative detection scheme; linear detection; packet error rate; space-time block coded system; spatial diversity; Bit error rate; Detection algorithms; Discrete Fourier transforms; Error correction; Fading; Feedback; Iterative algorithms; OFDM modulation; Peak to average power ratio; Sun;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th

ISSN

1550-2252

Print_ISBN

0-7803-8255-2

Type

conf

DOI

10.1109/VETECS.2004.1388926

Filename

1388926