Title :
Iterative frequency domain equalization for DQPSK signals
Author :
Pedrosa, Pedro ; Dinis, Rui ; Nunes, Fernando
Author_Institution :
lSR, Lisbon
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;
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
DOI :
10.1109/ISCIT.2007.4392127
