Title :
Combination of multiple turbo codes and multiple antennas for direct-sequence CDMA systems
Author :
Hayoung Yang ; Seoungkoo Lee ; Bonjin Ku ; Changeon Kang
Author_Institution :
Inf. & Telecommun. Lab., Yonsei Univ., Seoul, South Korea
Abstract :
A combined multiple turbo codes and multiple antenna diversity scheme for synchronous DS/CDMA systems over fading mobile radio channels is considered to improve the BER performance. In spite of the multiple structures no time delay and a lesser amount of computation can be achieved by a modified parallel mode decoding process and a reduced MAP algorithm using a code trellis structure. The performance of the proposed combining scheme is studied by means of simulation for a QPSK DS/CDMA system on a non-frequency selective Rayleigh fading channel.
Keywords :
Rayleigh channels; code division multiple access; decoding; diversity reception; error statistics; land mobile radio; multiuser channels; quadrature phase shift keying; spread spectrum communication; transmitters; turbo codes; BER performance; QPSK DS/CDMA system; code trellis structure; direct-sequence CDMA systems; diversity combining; fading mobile radio channels; multiple antenna diversity; multiple turbo codes; nonfrequency selective Rayleigh fading channel; parallel mode decoding; reduced MAP algorithm; synchronous DS/CDMA systems; transmitting antennas; Bit error rate; Concurrent computing; Decoding; Delay effects; Diversity reception; Fading; Land mobile radio; Mobile antennas; Multiaccess communication; Turbo codes;
Conference_Titel :
Consumer Electronics, 1999. ICCE. International Conference on
Conference_Location :
Los Angeles, CA, USA
Print_ISBN :
0-7803-5123-1
DOI :
10.1109/ICCE.1999.785282
