Title :
Effects of Channel Estimation Error on the BER Performance of OFDM Systems in Multipath Rayleigh Fading Channels
Author_Institution :
Tamkang Univ., Tamsui
Abstract :
In this paper, we study the effects of channel estimation error on the bit error rate (BER) of orthogonal frequency division multiplexing systems in multipath Rayleigh fading channels. Due to the additive white Gaussian noise and the intercarrier interference caused by the residual carrier frequency offset, the channel estimation based on the training symbols is not perfect. We characterize the performance degradation resulting from imperfect channel state information by deriving the BER formulas for BPSK, QPSK, and 16-QAM modulation schemes. Simulation results validate the accuracy of our derived formulas.
Keywords :
AWGN; OFDM modulation; Rayleigh channels; channel estimation; error statistics; intercarrier interference; multipath channels; quadrature amplitude modulation; quadrature phase shift keying; BER performance; BPSK; OFDM systems; QAM modulation; QPSK; additive white Gaussian noise; bit error rate; channel estimation error; intercarrier interference; multipath Rayleigh fading channel; orthogonal frequency division multiplexing systems; residual carrier frequency offset; Additive white noise; Binary phase shift keying; Bit error rate; Channel estimation; Channel state information; Degradation; Fading; Frequency estimation; Interference; OFDM;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-0263-2
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2007.237
