Title :
Efficient BER evaluation of linear multiuser detectors with imperfect channel estimation for CDMA fading channels
Author :
Ma, Yao ; Schober, Robert ; Pasupathy, Subbarayan ; Lim, Teng Joon
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
In this paper, we present a unified mathematical framework to analyze the bit-error rate (BER) performance of general linear coherent multiuser receivers with diversity reception and imperfect channel estimation for doubly selective Rician-fading asynchronous code-division multiple-access channels. BERs of linear receivers with channel state information and data-aided channel estimation are analyzed, and both exact and low-complexity approximate BER evaluation formulas are presented. Furthermore, by using a Markov chain steady-state analysis, a tight BER approximation for receivers with decision-directed channel estimation is proposed. Numerical and simulation results verify the accuracy of the proposed BER evaluation methods.
Keywords :
Markov processes; Rician channels; channel estimation; code division multiple access; diversity reception; error statistics; multiuser detection; BER evaluation; CDMA fading channels; Markov chain; bit error rate; channel state information; code division multiple access; data-aided channel estimation; diversity reception; doubly selective Rician-fading channels; imperfect channel estimation; linear coherent multiuser receivers; linear multiuser detectors; steady-state analysis; Bit error rate; Channel estimation; Channel state information; Detectors; Diversity reception; Fading; Information analysis; Multiaccess communication; Performance analysis; Steady-state; Bit-error rate (BER); data-aided channel estimation (DACE); decision-directed channel estimation (DDCE); diversity combining; doubly selective Rician-fading channels;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2005.863775
