A comparison of convolutional and Walsh coding in OFDM wireless LAN systems

Author

McCormick, A.C. ; Grant, P.M. ; Thompson, J.S.

Author_Institution

Dept. of Electron & Electr. Eng., Edinburgh Univ., UK

Volume

1

fYear

2000

fDate

2000

Firstpage

166

Abstract

A Walsh coded OFDM system is described which could provide an alternative to convolutional coding in packet based wireless LAN systems. This allows lower complexity decoding and lower peak-to-average power ratios. This system is compared with a hard decision decoded convolutional receiver, based on the OFDM specifications for the IEEE 802.11 and ETSI HIPERLAN/2 physical layer standards. In multipath environments, the high diversity Walsh coded OFDM system shows large improvements over uncoded systems and similar performance to the more computationally complex convolutional receivers

Keywords

IEEE standards; OFDM modulation; convolutional codes; decoding; diversity reception; modulation coding; multipath channels; radio receivers; telecommunication standards; wireless LAN; ETSI HIPERLAN/2; IEEE 802.11; OFDM specifications; OFDM wireless LAN systems; convolutional coding; decoding; hard decision decoded convolutional receiver; high diversity Walsh coded OFDM system; multipath environments; packet based wireless LAN systems; peak-to-average power ratio; performance; physical layer standards; Convolution; Convolutional codes; Decoding; Multiaccess communication; OFDM; Peak to average power ratio; Physical layer; Telecommunication standards; Time division multiple access; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-6463-5

Type

conf

DOI

10.1109/PIMRC.2000.881411

Filename

881411