Iterative frequency domain equalization for DQPSK signals

Author

Pedrosa, Pedro ; Dinis, Rui ; Nunes, Fernando

Author_Institution

lSR, Lisbon

fYear

2007

fDate

17-19 Oct. 2007

Firstpage

808

Lastpage

813

Abstract

Differentially encoded quadrature phase shift keying (DQPSK) modulation has worse bit error rate than coherent QPSK but on the other hand DQPSK is more robust to carrier frequency offset (CFO) offering a solution to the problem presented by the presence of CFO in wireless communication systems based on block transmission. Iterative block decision feedback equalization (IB-DFE) with CFO estimator proved to be a valid receiver structure for single carrier frequency domain equalization (SC-FDE) combined with QPSK modulations. In this paper we test the natural extension of the IB-DFE receiver for SC-FDE combined with DQPSK modulations in the presence of CFO.

Keywords

decision feedback equalisers; error statistics; iterative methods; quadrature phase shift keying; BER performance; DQPSK signals; QPSK modulation; bit error rate; block transmission; carrier frequency offset; differentially encoded quadrature phase shift keying modulation; iterative block decision feedback equalization; iterative single carrier frequency domain equalization; wireless communication system; Bit error rate; Decision feedback equalizers; Frequency domain analysis; Frequency estimation; Frequency shift keying; Phase modulation; Quadrature phase shift keying; Robustness; Testing; Wireless communication; Carrier frequency offset; differential encoding; frequency domain equalization; iterative block decision feedback equalization; single carrier;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies, 2007. ISCIT '07. International Symposium on

Conference_Location

Sydney,. NSW

Print_ISBN

978-1-4244-0976-1

Electronic_ISBN

978-1-4244-0977-8

Type

conf

DOI

10.1109/ISCIT.2007.4392127

Filename

4392127