Title :
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
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;
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
DOI :
10.1109/PIMRC.2000.881411
