Title :
Performance of parallel concatenated interleaved codes in correlated multipath fading channels in a DS-CDMA system
Author :
Kafle, Padam Lal ; Mäkeläinen, Kimo ; Rajatheva, R.M.A.P.
Author_Institution :
Telecommun. Program, Asian Inst. of Technol., Bangkok, Thailand
Abstract :
The performance of a turbo code is investigated for high-bit-rate data transmission in a wideband DS-CDMA system. The effect of correlated multipath fading is studied by considering the performance at typical high and low mobile speeds, when the size of the external interleaver is varied. The performance of the turbo code is found to degrade significantly at low mobile speeds, when a small external interleaver is used. Comparison is also made with an equal decoding complexity convolutional code, over which the turbo code provides a distinct coding gain. Hence, turbo codes are found to be attractive for channel coding in WCDMA based mobile radio systems like UMTS
Keywords :
Rayleigh channels; broadband networks; channel coding; code division multiple access; concatenated codes; correlation methods; decoding; interleaved codes; land mobile radio; multipath channels; multiuser channels; radio links; spread spectrum communication; turbo codes; DS-CDMA system; Rayleigh channel; UMTS; WCDMA; channel coding; coding gain; convolutional code; correlated multipath fading channels; decoding complexity; downlink; high bit rate data transmission; high mobile speed; low mobile speed; mobile radio systems; parallel concatenated interleaved codes; performance; turbo codes; wideband DS-CDMA system; Concatenated codes; Convolutional codes; Data communication; Decoding; Degradation; Fading; Interleaved codes; Multiaccess communication; Turbo codes; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778351
