Title :
Iterative Maximal Ratio Combining Channel Estimation for Multiuser Detection on a Time Frequency Selective Wireless CDMA Channel
Author :
Shi, Zhenning ; Reed, Mark C.
Author_Institution :
Res. Sch. of Inf. Sci. & Eng., Australian Nat. Univ., Braddon, ACT
Abstract :
In this paper, we investigate the performance of DS-CDMA systems in dispersive fading channels. We develop a low-complexity receiver that jointly performs channel estimation and multiuser decoding in an iterative manner. Pilot symbols, together with the soft decoding information on the transmitted data are harnessed to estimate the time-varying channel states, which in turn leads to improved detection and decoding results. We show through simulation and mean square error analysis that the proposed system can sustain a high-throughput WCDMA transmission.
Keywords :
channel estimation; code division multiple access; least mean squares methods; multiuser detection; spread spectrum communication; wireless channels; DS-CDMA systems; dispersive fading channels; high-throughput WCDMA transmission; iterative maximal ratio combining channel estimation; low-complexity receiver; mean square error analysis; multiuser decoding; multiuser detection; soft decoding information; time frequency selective wireless CDMA channel; time-varying channel states; Channel estimation; Dispersion; Diversity reception; Fading; Iterative decoding; Multiaccess communication; Multiuser detection; State estimation; Time frequency analysis; Time-varying channels;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.190