Error Rate for PSK and QAM Modulations for Non-Ideal OFDM Systems with Noisy Channel Estimates and Receive Diversity

Author

Montojo, Juan I. ; Milstein, Laurence B.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California at San Diego, La Jolla, CA, USA

Volume

59

Issue

10

fYear

2011

fDate

10/1/2011 12:00:00 AM

Firstpage

2703

Lastpage

2715

Abstract

This paper characterizes the SER for a non-ideal OFDM system with either M-PSK or M-QAM constellations operating over a frequency-selective, time-varying, Rayleigh fading channel. The imperfections that we consider are inter-carrier interference (ICI) and/or inter-symbol interference (ISI), imperfect time and frequency synchronization, and noisy channel estimates. We consider an MRC receiver with L diversity branches. We present SER characterizations with and without ISI, and show that the effect of ISI, especially for higher order modulation schemes, e.g., 8PSK and above, can be very severe, irrespective of the number of diversity branches.

Keywords

OFDM modulation; Rayleigh channels; channel estimation; diversity reception; error statistics; intercarrier interference; phase shift keying; quadrature amplitude modulation; time-varying channels; ICI; ISI; M-PSK constellation; M-QAM constellation; MRC receiver; PSK modulation; QAM modulation; Rayleigh fading channel; SER; error rate; frequency synchronization; frequency-selective channel; imperfect channel estimation; intercarrier interference; intersymbol interference; noisy channel estimation; nonideal OFDM system; receive diversity; time synchronization; time-varying channel; Channel estimation; Diversity reception; Error analysis; Frequency synchronization; Modulation; Noise measurement; OFDM; ICI; ISI; OFDM; Rayleigh process; imperfect channel estimation; pilot symbol-assisted modulation (PSAM);

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2011.081210.090609

Filename

5997281