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Título:
Reduced complexity multiuser receivers for asynchronous trellis coded DS-CDMA systems
Autor/es:
GRACIELA CORRAL BRIONES; CARMEN E. RODRIGUEZ; MARIO R. HUEDA
Lugar:
Rhodes
Reunión:
Conferencia; VTC 2001 Spring. IEEE VTS 53rd Vehicular Technology Conference, 2001.; 2001
Resumen:
Previous works have shown that multiuser receivers with trellis-coded
modulation significantly improve performance in CDMA transmissions over
bandwidth limited AWGN channels. In Corral-Briones et al., a
reduced-state multiuser receiver (RSMR) that jointly decodes the
trellis code and equalizes the multiuser interference of the channel
has been introduced. In this paper the performance of this
reduced-state family is studied for a heavily loaded bandwidth limited
communication system. Unlike the previous work we address the
performance of RSMR in situations of practical interest such as in high
bandwidth efficiency situations and in near-far situations. Simulation
results show that performance near the trellis-coded single user bound
is achieved with this scheme at a drastically reduced complexity
compared with that of the optimal receiver. Moreover we analyze the
near-far resistance of RSMR and other suboptimal schemes. Results show
that RSMR significantly outperforms previously known suboptimal
structures