Title :
A new scheme for direct sequence spread spectrum radio LANs
Author :
Fuente, M.P. ; Guo, Y.J. ; Barton, S.K.
Author_Institution :
Dept. of Electron. & Electr. Eng., Bradford Univ., UK
Abstract :
A new direct sequence spread spectrum scheme for ISM band radio local area networks using BPSK modulation and matched filter receivers is presented. It employs an optimised 22-chip sequence whose two 11-chip segments are alternately used as spreading sequences for adjacent symbols. Owing to the low cross-correlation between the two 11-chip segments, the inter-symbol interference caused by long delays in multipath channels is significantly reduced. In the paper, a receiver structure using the optimised sequence and time diversity is described and simulation results are given. Compared with the schemes using the short 11-chip Barker code and long M-sequences, the new scheme offers superior system performance
Keywords :
diversity reception; interference suppression; intersymbol interference; matched filters; multipath channels; phase shift keying; pseudonoise codes; radio receivers; radiofrequency interference; sequential codes; spread spectrum communication; wireless LAN; 11-chip segments; 2.4 GHz; BPSK modulation; ISM band; adjacent symbols; direct sequence spread spectrum radio LANs; inter-symbol interference; interference reduction; long M-sequences; long delays; low cross-correlation; matched filter receivers; multipath channels; optimised 22-chip sequence; optimised sequence; receiver structure; short 11-chip Barker code; simulation; system performance; time diversity; Binary phase shift keying; Delay; Interference; Local area networks; Matched filters; Multipath channels; Receivers; Spread spectrum communication; System performance; Wireless LAN;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563520
