Title :
An EM-based MAP detector for CPM signals transmitted over frequency-flat fading channels
Author :
Chiavaccini, Eugenio ; Vitetta, Giorgio M.
Author_Institution :
Dept. of Inf. Eng., Modena Univ., Italy
Abstract :
In this paper the expectation-maximization (EM) algorithm for maximum a posteriori (MAP) estimation of a random vector is applied to the problem of symbol detection for CPM signals transmitted over time-selective Rayleigh fading channels. This results in a soft-in soft-out (SISO) detection algorithm suitable for iterative detection/decoding schemes. Simulation results show that the error performance provided by the proposed solution is very close to that of a MAP detector endowed with an ideal knowledge of the channel state
Keywords :
Rayleigh channels; continuous phase modulation; iterative decoding; maximum likelihood detection; maximum likelihood estimation; mobile radio; time-varying channels; CPM signal transmission; EM-based detector; MAP detector; Rayleigh fading channels; SISO detection; error performance; expectation-maximization algorithm; frequency-flat fading channels; iterative decoding; iterative detection; maximum a posteriori estimation; mobile radio; random vector; soft-in soft-out detection; symbol detection; time-selective channels; Channel coding; Computational complexity; Detection algorithms; Detectors; Fading; Frequency; Iterative algorithms; Iterative decoding; Pulse modulation; Signal detection;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965659
