Title :
Fast dual-mode adaptive algorithms for the equalization and timing recovery of TDMA mobile radio signals
Author :
Giridhar, K. ; Shynk, John J. ; Iltis, Ronald A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barabara, CA, USA
Abstract :
Adaptive algorithms with rapid convergence properties for the equalization of time division multiple access (TDMA) mobile radio signals are presented. When the symbol timing is known, these algorithms approximate maximum a posteriori (MAP) sequence estimators that generate reliable estimates of the transmitted signal. For channels with timing jitter (from random Doppler shifts), joint estimation of the channel parameters and the symbol timing using an extended Kalman filter (EKF) algorithm is proposed. Various methods to reduce the computational complexity of the MAP sequence estimator are also described
Keywords :
Kalman filters; adaptive filters; computational complexity; convergence of numerical methods; equalisers; filtering and prediction theory; mobile radio systems; synchronisation; telecommunication channels; time division multiple access; MAP sequence estimator; TDMA; adaptive algorithms; channel parameters; communication channels; computational complexity; convergence; extended Kalman filter; fast dual mode algorithms; mobile radio signals; random Doppler shifts; symbol timing; time division multiple access; timing jitter; timing recovery; Adaptive algorithm; Adaptive equalizers; Decision feedback equalizers; Fading; Land mobile radio; Maximum likelihood estimation; Signal processing; Switches; Time division multiple access; Timing jitter;
Conference_Titel :
Signals, Systems and Computers, 1992. 1992 Conference Record of The Twenty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-3160-0
DOI :
10.1109/ACSSC.1992.269178
