Title :
Turbo coded/diversity combining scheme for hybrid DS/SFH CDMA systems
Author :
Xu, Hongjun ; Takawira, F.
Author_Institution :
Sch. of Electr. & Electron. Eng., Natal Univ., Durban, South Africa
Abstract :
In this paper the performance of a combined turbo coding and diversity in a hybrid direct-sequence/slow frequency hopping CDMA (DS/SFH CDMA) communication over fading mobile radio channel is considered. The paper shows that turbo codes have a built-in structure that is suitable for diversity techniques. In the scheme presented here, the binary input data to a rate 1/3 multiple turbo code encoder produces three coded bits, which, in turn, are assigned to two different antennas and then transmitted from each antenna simultaneously. The bit error rate (BER) performance of the proposed scheme is studied by means of simulation for a quadrature phase shift keying (QPSK) DS/SFH CDMA system on a nonfrequency selective Rayleigh fading channel
Keywords :
Rayleigh channels; code division multiple access; diversity reception; error statistics; frequency hop communication; mobile radio; quadrature phase shift keying; spread spectrum communication; turbo codes; BER performance; DS/SFH CDMA communication; QPSK; bit error rate; diversity; fading channel; hybrid direct-sequence/slow frequency hopping CDMA; mobile radio channel; nonfrequency selective Rayleigh fading channel; quadrature phase shift keying; turbo coded/diversity combining scheme; turbo codes; Bit error rate; Diversity reception; Fading; Frequency diversity; Mobile communication; Multiaccess communication; Quadrature phase shift keying; Spread spectrum communication; Transmitting antennas; Turbo codes;
Conference_Titel :
Africon, 1999 IEEE
Conference_Location :
Cape Town
Print_ISBN :
0-7803-5546-6
DOI :
10.1109/AFRCON.1999.820769
