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CORRAL BRIONES graciela
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Título:
Trellis-based multiuser receivers for asynchronous trellis coded DS-CDMA systems
Autor/es:
GRACIELA CORRAL BRIONES; CARMEN E. RODRIGUEZ; MARIO R. HUEDA
Lugar:
Helsinki
Reunión:
Conferencia; IEEE International Conference on Communications, 2001. ICC 2001.; 2001
Resumen:
We propose a new reduced-complexity multiuser receiver for asynchronous
trellis-coded CDMA systems in AWGN channels. Based on the coding
information of a subset of users and the set partitioning principles
inherent in TCM, reduced-state trellises are constructed. The Viterbi
algorithm is thus used to jointly decode the trellis codes of this
subset of users and equalize the multiuser interference of the channel.
As a special case of the proposed receiver, we study a structure that
decodes only one user and equalizes the multiuser interference.
Simulation results show that the performance of the new reduced
complexity receiver approaches the trellis-coded single-user bound for
both low and high-interference channels. Moreover, we compare the
performance of the proposed receiver with that of previously proposed
suboptimal structures. Our scheme is found to significantly outperform
previously known suboptimal structures