Title :
Analysis of a transmit diversity scheme in fading channels and imperfect channel estimation
Author :
Ang, W.C. ; Ng, C.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
The theoretical analysis of the error performance of a simple transmit diversity scheme is carried out for Rayleigh and Rician fading using QPSK. A closed form expression is derived for the SER. The computer simulations which are performed matches the results obtained through the closed form expressions. The performance of the scheme with imperfect channel estimation using pilot signals is investigated and analyzed. It is found that the deterioration of performance in transmit diversity when there is channel estimation error is about 5 dB. The sensitivity of the system to estimation error is investigated by analyzing the effects of reducing the error caused by noise when estimating the channel.
Keywords :
Rayleigh channels; Rician channels; channel estimation; diversity reception; error statistics; quadrature phase shift keying; transmitting antennas; QPSK; Rayleigh fading; Rician fading; SER; channel estimation error; closed form expression; closed form expressions; computer simulations; error performance; fading channels; imperfect channel estimation; pilot signals; system sensitivity; transmit diversity; Channel estimation; Computer errors; Computer simulation; Error analysis; Estimation error; Fading; Performance analysis; Quadrature phase shift keying; Rician channels; Signal analysis;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1182463
