Title :
Approaching the capacity of multiple access channels using interleaved low-rate codes
Author :
Ping, Li ; Liu, Lihai ; Wu, K.Y. ; Leung, W.K.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
Abstract :
We show that the capacity of a Gaussian multiple access channel can be approached by interleaved low-rate codes together with a simple chip-by-chip iterative decoding strategy. Based on a rate ≈ 1/69 code and with a total of 35 simultaneous users (the aggregate rate ≈ 1/2), performance of BER=10-5 is observed at Eb/N0 ≈ 1.4 dB, which is close to the corresponding capacity limit (Eb/N0 ≈ 0 dB).
Keywords :
AWGN channels; channel capacity; code division multiple access; interleaved codes; iterative decoding; multiuser detection; spread spectrum communication; turbo codes; Gaussian multiple access channel; channel capacity; chip-by-chip iterative decoding strategy; interleaved low-rate codes; multiuser detection; AWGN; Aggregates; Channel capacity; Gaussian noise; Iterative decoding; Multiaccess communication; Multiuser detection; Spread spectrum communication; Transmitters; Turbo codes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2003.822534
