Title :
An iterative algorithm for asynchronous coded multiuser detection
Author :
Moher, Michael ; Guinand, Paul
Author_Institution :
Commun. Res. Centre, Ottawa, Ont., Canada
Abstract :
A multiuser detection algorithm, applicable to asynchronous users having the same signaling waveform and power levels, is presented. Users are assumed to employ forward error correction coding but with different pseudorandom interleaving. The algorithm is derived from iterative techniques for cross-entropy minimization, similar to turbo decoding. Simulations show that the detector is limited by the theoretical channel capacity at low signal-to-noise ratio (SNR) and asymptotically achieves single user performance at high SNR.
Keywords :
channel capacity; error correction codes; forward error correction; interleaved codes; iterative methods; minimum entropy methods; multi-access systems; signal detection; asynchronous coded multiuser detection; asynchronous multiple access; channel capacity; cross-entropy minimization; forward error correction coding; high SNR; iterative algorithm; low SNR; low signal-to-noise ratio; multiuser detection algorithm; power levels; pseudorandom interleaving; signaling waveform; simulations; single user performance; turbo decoding; Detectors; Forward error correction; Interleaved codes; Intersymbol interference; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Minimization methods; Multiaccess communication; Multiuser detection;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.709440
