Effect of carrier frequency offset on time-domain differential demodulation in OFDM systems

Author

Lee, Jungwon ; Toumpakaris, Dimitris ; Lou, Hui-Ling ; Cioffi, John M.

Author_Institution

Marvell Semicond. Inc., Sunnyvale, CA, USA

Volume

1

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

568

Abstract

This paper analyzes the effect of the carrier frequency offset on time-domain differential demodulation in orthogonal frequency division multiplexing (OFDM) systems. Exact signal-to-noise ratio (SNR) and accurate symbol error rate (SER) expressions are derived in the presence of the frequency offset. Using the SNR expression, the SNR degradation due to the frequency offset is quantified. The effect of the frequency offset on time-domain differential demodulation is compared with that on coherent demodulation. It is found that time-domain differential demodulation is more sensitive to carrier frequency offsets compared to coherent demodulation. The analysis in this paper not only provides insights into how the carrier frequency offset affects the system performance, but can also be used to determine the maximum tolerable frequency offset given a target SER.

Keywords

OFDM modulation; demodulation; error analysis; error statistics; frequency estimation; noise; time-domain analysis; OFDM systems; SNR; carrier frequency offset; coherent demodulation; maximum tolerable frequency offset; orthogonal frequency division multiplexing; signal-to-noise ratio; symbol error rate; system performance; target SER; time-domain differential demodulation; Degradation; Demodulation; Digital video broadcasting; Error analysis; OFDM modulation; Performance analysis; Signal to noise ratio; System performance; Time domain analysis; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400071

Filename

1400071