Title :
Suboptimal multiuser detector for frequency-selective Rayleigh fading synchronous CDMA channels
Author :
Zvonar, Z. ; Brady, D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
Abstract :
Proposes a suboptimal low-complexity multiuser receiver for synchronous CDMA frequency-selective Rayleigh fading channels. In contrast to the conventional RAKE receiver, which suffers from near-far effects due to channel fading, the proposed multiuser receiver is shown to alleviate the near-far problem while preserving multipath diversity gain. This is demonstrated by comparing the symbol error probability and asymptotic multiuser efficiency of the proposed multiuser detector and RAKE receiver.<>
Keywords :
Rayleigh channels; code division multiple access; communication complexity; diversity reception; error statistics; fading; receivers; signal detection; synchronisation; time-varying channels; RAKE receiver; asymptotic multiuser efficiency; channel fading; frequency-selective Rayleigh fading synchronous CDMA channels; multipath diversity gain; near-far effects; suboptimal low-complexity multiuser receiver; suboptimal multiuser detector; symbol error probability; Code division multiplexing; Detectors; Diversity methods; Error probability; Fading; Frequency; Multipath channels; RAKE receivers; Rayleigh channels;
Journal_Title :
Communications, IEEE Transactions on
