Title :
Intercarrier interference cancellation scheme for OFDM communication systems
Author :
Chuandan Wang ; Zhongpei Zhang ; Shaoqian Li ; Chuansheng Fu
Author_Institution :
Nat. Key Lab Of Commun., Univ. of Electron. Sci. & Technol. of China, China
Abstract :
The paper studies an efficient ICI cancellation method termed segment equalization scheme. According to the time-variant nature of the mobile channel, the received OFDM signal and channel impulse response (CIR) are divided into many segments before FFT, then all the segments are equalized in the frequency-domain, the results are summed to demodulate the OFDM signal. Simulations and performance analysis show that an OFDM system using the proposed segment equalization can effectively reduce the ICI caused by the frequency offset and large Doppler frequencies in mobile radio channels.
Keywords :
Doppler effect; OFDM modulation; equalisers; fast Fourier transforms; interference suppression; mobile radio; radiofrequency interference; transient response; Doppler frequencies; FFT; ICI cancellation; OFDM communication systems; channel impulse response; frequency offset; frequency-domain; intercarrier interference cancellation; mobile radio channels; segment equalization; Analytical models; Computational modeling; Frequency domain analysis; Interference cancellation; Land mobile radio; Mobile communication; OFDM modulation; Paper technology; Performance analysis; Signal processing;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346089
