Title :
Block differential encoding for rapidly fading channels
Author :
Lu, Bing ; Ma, Xiaoli ; Giannakis, Georgios B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
Rapidly fading channels provide Doppler-induced diversity, but are also challenging to estimate. To by-pass channel estimation, we derive a novel block differential codec. Relying on a basis expansion model for time-varying channels, our block differential design is easy to implement, and achieves the maximum possible Doppler diversity. Simulation results corroborate our theoretical analysis.
Keywords :
Doppler effect; block codes; channel coding; codecs; differential detection; diversity reception; mobile radio; time-varying channels; Doppler-induced diversity; basis expansion model; block differential codec; block differential encoding; mobile communications; rapidly fading channels; time-varying channels; AWGN; Channel estimation; Codecs; Decoding; Differential phase shift keying; Differential quadrature phase shift keying; Fading; Frequency diversity; OFDM; Time-varying channels;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202580
