Title :
Multistage channel estimation with LMS parallel interference cancellation for asynchronous DS-CDMA in frequency-selective Rayleigh channels
Author :
Xue, Xiaoming ; Tjhung, Tjeng Thiang
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
We propose a multistage channel estimation method using LMS parallel interference cancellation with the assistance of periodically transmitted pilot symbols. After obtaining the channel estimates, the performance of various parallel interference methods are evaluated. RAKE reception and maximum ratio combining (MRC) are adopted. Simulation results show that the proposed channel estimation scheme for DS-CDMA system works well in frequency-selective Rayleigh fading channels with Doppler spread when the system load is not too high
Keywords :
Rayleigh channels; code division multiple access; diversity reception; interference suppression; least mean squares methods; parameter estimation; radio receivers; spread spectrum communication; Doppler spread; LMS parallel interference cancellation; RAKE reception; asynchronous DS-CDMA; frequency-selective Rayleigh fading channels; maximum ratio combining; multistage channel estimation; periodically transmitted pilot symbols; AWGN; Channel estimation; Delay effects; Fading; Frequency estimation; Interference cancellation; Least squares approximation; Multiaccess communication; Multiple access interference; Signal processing;
Conference_Titel :
Signal Processing and its Applications, Sixth International, Symposium on. 2001
Conference_Location :
Kuala Lumpur
Print_ISBN :
0-7803-6703-0
DOI :
10.1109/ISSPA.2001.950166
