Title :
A blind adaptive MAP algorithm for the recovery of cochannel signals
Author :
Giridhar, K. ; Mathur, Amit ; Shynk, John J.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
This paper describes a blind adaptive algorithm for the recovery of cochannel data signals in the presence of intersymbol interference. Assuming unknown finite impulse response channel characteristics, the principle of maximum a posteriori symbol detection (MAPSD) is employed to jointly estimate the channels and the transmitted data. In order to reduce the complexity of this joint blind MAPSD algorithm, a cascaded multistage structure is proposed whereby each stage recovers one of the cochannel sources. This suboptimal approach is expected to perform well when the cochannel signals have sufficiently different power levels. Computer simulations for a primary signal and a single interferer illustrate the rapid convergence properties of the algorithm
Keywords :
adaptive signal processing; cochannel interference; computational complexity; convergence of numerical methods; intersymbol interference; maximum likelihood estimation; transient response; blind adaptive MAP algorithm; cascaded multistage structure; cochannel signals recovery; computational complexity; computer simulations; convergence properties; finite impulse response channel characteristics; intersymbol interference; maximum a posteriori symbol detection; primary signal; single interferer; suboptimal approach; transmitted data; Adaptive algorithm; Computer simulation; Convergence; Data engineering; Information processing; Information systems; Interchannel interference; Intersymbol interference; Laboratories; Maximum likelihood estimation;
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
DOI :
10.1109/MILCOM.1994.473821
