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

Volume

1

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

1

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258190

Filename

1258190