High speed radio communication technology using parallel combinatory CDMA under multipath Rayleigh-fading interference environment

Author

Watanabe, Masatoshi ; Kato, Osamu ; Katsura, Eiji ; Homma, Koichi

Author_Institution

Telecom Res. Lab., Matsushita Commun. Ind. Co. Ltd., Yokohama, Japan

Volume

1

fYear

1996

Firstpage

407

Abstract

The CDMA system is a next generation access technique that holds the promise of greatly increased capacity for cellular systems. We propose a convolutional coding and soft decision Viterbi decoding method applicable to a parallel combinatory CDMA (PC-CDMA) system. In the proposed method, branch metric is calculated for every four bits by weighting the output levels of the PC-CDMA correlators to introduce bit interleaving and soft decision to the system. The result of our simulation using this method under a multipath Rayleigh-fading interference environment shows a BER of 10^-5 or less for the transmission of a 1.92 Mbps data stream at a chip rate of 7.68 Mcps

Keywords

Rayleigh channels; Viterbi decoding; code division multiple access; coding errors; correlators; data communication; error statistics; fading; interleaved codes; land mobile radio; multipath channels; radiofrequency interference; 1.92 Mbit/s; BER; PC-CDMA correlators; PC-CDMA system; bit interleaving; branch metric; cellular systems; chip rate; convolutional coding; data stream transmission; high speed radio communication; multipath Rayleigh fading interference; output level weighting; parallel combinatory CDMA; simulation; soft decision; soft decision Viterbi decoding; Communications technology; Convolutional codes; Correlators; Decoding; Interference; Interleaved codes; Multiaccess communication; Radio communication; Rayleigh channels; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th

ISSN

1090-3038

Print_ISBN

0-7803-3157-5

Type

conf

DOI

10.1109/VETEC.1996.503479

Filename

503479