Title :
Effect of channel estimation error onto the BER performance of PSAM-OFDM in Rayleigh fading
Author :
Chen, Jiming ; Tang, Youxi ; Li, Shaoqian ; Li, Yingtao
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, the current analysis focuses on the influence of BER performance in Rayleigh fading propagation environments, which results from the channel estimation error of pilot symbol assisted modulation (PSAM) in orthogonal frequency division multiplexing (OFDM) systems. This paper first characterizes the distribution of the amplitude and phase estimates using PSAM, and the formula for BER as a function of channel correlation and interpolation filter in time and frequency is given. Also interchannel interference due to Doppler effects is taken into account. Theoretical and simulation results show that channel estimation error leads to a 1-dB degradation in average signal-to-noise ratio for the parameters considered.
Keywords :
Doppler effect; OFDM modulation; Rayleigh channels; adjacent channel interference; amplitude estimation; channel estimation; correlation methods; error statistics; interpolation; mobile radio; phase estimation; quadrature amplitude modulation; quadrature phase shift keying; BER performance; Doppler effect; OFDM system; PSAM; Rayleigh fading propagation environment; amplitude estimation; channel correlation; channel estimation error; interchannel interference; interpolation filter; orthogonal frequency division multiplexing; phase estimation; pilot symbol assisted modulation; Amplitude estimation; Bit error rate; Channel estimation; Filters; Frequency estimation; Interpolation; OFDM modulation; Performance analysis; Phase estimation; Rayleigh channels;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285970
