Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.503479
