Title :
Adaptive OVSF design in WCDMA system
Author :
Hou, Jia ; Lee, Moon Ho
Author_Institution :
Chonbuk Nat. Univ., Chonju, South Korea
fDate :
30 Aug.-2 Sept. 2004
Abstract :
We have designed an adaptive orthogonal variable spreading factor (OVSF) transmission scheme in a wideband code-division multiple access (WCDMA) system. The article studies the effects of applying adaptive lengths of spreading factors to a WCDMA system. The system is modeled following the WCDMA standards, Rayleigh fading channel and multiple access interference (MAI). Rate one-half low density parity check (LDPC) codes and turbo codes are studied as the channel coding for each user.
Keywords :
Rayleigh channels; channel coding; code division multiple access; parity check codes; radiofrequency interference; spread spectrum communication; turbo codes; LDPC codes; MAI; Rayleigh fading channel; W-CDMA; WCDMA; adaptive OVSF design; adaptive orthogonal variable spreading factor transmission scheme; adaptive spreading factor length; channel coding; low density parity check codes; multiple access interference; turbo codes; wideband code-division multiple access; Bandwidth; Electronic mail; Feedback; Modulation coding; Moon; Multiaccess communication; Multiple access interference; Parity check codes; Signal to noise ratio; Turbo codes;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2004 IEEE Eighth International Symposium on
Print_ISBN :
0-7803-8408-3
DOI :
10.1109/ISSSTA.2004.1371818
