Title :
Capacity comparison of turbo and convolutional codes in multi-cell DS-CDMA systems
Author :
Yuan Li ; Li, Kwok H.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
The reverse-link capacity of multi-cell DS-CDMA systems is compared for turbo and convolutional codes, where the distribution of multiple-access interference is approximated as Gaussian in the decoding process. Frame sizes and processing gains representing narrow- and wide-band DS-CDMA systems are examined. Simulation results show that the accuracy of Gaussian approximation is acceptable for the reverse-link application. While marginal improvement is observed in narrow-band turbo-coded DS-CDMA systems, turbo codes are capable of doubling the capacity over conventional codes in wide-band DS-CDMA systems
Keywords :
Gaussian distribution; cellular radio; channel capacity; channel coding; code division multiple access; convolutional codes; multiuser channels; radio links; radiofrequency interference; spread spectrum communication; turbo codes; Gaussian approximation; Gaussian distribution; capacity comparison; cellular radio; channel coding; convolutional codes; decoding; frame size; multi-cell DS-CDMA systems; multiple-access interference; narrow-band DS-CDMA systems; processing gain; reverse-link; reverse-link capacity; simulation results; turbo codes; wide-band DS-CDMA systems; Convolutional codes; Error correction codes; Gaussian approximation; Iterative decoding; Maximum likelihood decoding; Multiaccess communication; Multiple access interference; Narrowband; Turbo codes; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886822
