Title :
Symbol-by-symbol MAP detection of differential frequency hopping signals over Rayleigh flat fading channels
Author :
Zhang, Rui ; Liu, Kaihua
Author_Institution :
Sch. of Electr. Inf., Tianjin Univ.
Abstract :
In this paper, a symbol-by-symbol MAP (SBS-MAP) detection of differential frequency hopping (DFH) signals over Rayleigh flat fading channels is proposed. Because the frequency sequence of DFH signals can be interpreted as a Markov chain, the algorithm is based on a trellis diagram used to describe the state transition of a Markov source. The SBS-MAP can produce the a posteriori probability for each transmitted symbol by utilizing the a priori information and the correlation information between successive transmitted symbols. Simulation results demonstrate that the proposed detection scheme outperforms others such as fast Fourier transform (FFT) detection and maximum likelihood sequence estimation (MLSE) detection in terms of error rate performance
Keywords :
Markov processes; Rayleigh channels; fast Fourier transforms; frequency hop communication; maximum likelihood sequence estimation; FFT; MLSE detection; Markov chain; Rayleigh flat fading channels; a posteriori probability; differential frequency hopping signals; error rate performance; fast Fourier transform; frequency sequence; maximum likelihood sequence estimation; symbol-by-symbol MAP detection; trellis diagram; Baseband; Detectors; Fading; Fast Fourier transforms; Frequency shift keying; Matched filters; Maximum likelihood detection; Maximum likelihood estimation; Random variables; Spread spectrum communication;
Conference_Titel :
Electrical and Computer Engineering, 2005. Canadian Conference on
Conference_Location :
Saskatoon, Sask.
Print_ISBN :
0-7803-8885-2
DOI :
10.1109/CCECE.2005.1557289
