Title :
Equalization of π/4 offset DQPSK transmitted over flat fading channels
Author :
Fattouche, Michel ; Zaghloul, Hatim
Author_Institution :
Calgary Univ., Alta., Canada
Abstract :
The authors propose an algorithm for an equalizer/demodulator to minimize the effects of the propagation channel on π/4 offset differential quadrature phase shift keying (DQPSK) modulated symbols transmitted over a flat fading channel. The proposed equalizer/demodulator takes as input the in-phase and quadrature samples of the received signal and outputs the corresponding decoded bits. The equalizer uses a Hilbert transform to estimate the absolute value of the phase differential of the carrier from the envelope of the carrier. This is demonstrated on a mobile radio channel
Keywords :
demodulators; equalisers; fading; mobile radio systems; phase shift keying; telecommunication channels; Hilbert transform; differential quadrature phase shift keying; equalisation; equalizer/demodulator; flat fading channels; mobile radio channel; pi /4 offset DQPSK; Amplitude estimation; Equalizers; Fading; Frequency estimation; Land mobile radio; Phase estimation; Phase modulation; Radio frequency; Research and development; Time division multiple access;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268245
