Title :
BER performance of differential demodulation OFDM system in multipath fading channels
Author :
Lijun, Song ; Youxi, Tang ; Shaoqian, Li ; Yingtao, Li
Author_Institution :
Nat. Key Lab of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, the bit error rate (BER) performance of orthogonal frequency division multiplexing (OFDM) system in multipath fading channels using the frequency domain differential demodulation (FDDD) and time domain differential demodulation (TDDD) is analyzed. The results indicate that in frequency-nonselective fading channel, the BER performance of FDDD is better than that of TDDD. In frequency-selective fading channel, if the time delay doesn´t exceed the guard time, the BER performance of TDDD is not affected by the multipath and time delay, but it is affected by the Doppler frequency; the BER performance of FDDD is affected by the time delay and the Doppler frequency at the same time. With the increase of Doppler frequency, the BER performance of FDDD is better than that of TDDD demodulation.
Keywords :
Doppler effect; OFDM modulation; delays; demodulation; error statistics; fading channels; frequency-domain analysis; multipath channels; time-domain analysis; BER performance; Doppler frequency; OFDM system; bit error rate; differential demodulation; frequency domain differential demodulation; frequency-nonselective fading channel; frequency-selective fading channel; multipath fading channels; orthogonal frequency division multiplexing; time delay; time domain differential demodulation; Bit error rate; Delay effects; Demodulation; Fading; Frequency domain analysis; OFDM; Performance analysis; Telecommunication standards; Time domain analysis; Transceivers;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258190
