Summary: Sequence MAP Decoding of Trellis Codes for Gaussian
and Rayleigh Channels
Saud A. Al­Semari 1 , Fady Alajaji 2 and Tom Fuja 3
1
Electrical Eng. Dept., King Fahd University of Petroleum and Minerals Dhahran 31261, Saudi Arabia
2 Department of Mathematics and Statistics, Queen's University at Kingston, Ontario, Canada K7L 3N6
3 Electrical Eng. Dept. and Institute for Systems Research, University of Maryland, College Park, MD 20742, USA
Email: semari@dpc.kfupm.edu.sa, fady@polya.mast.queensu.ca and fuja@eng.umd.edu
Abstract --- This paper examines the gains that
can be obtained when maximum a posteriori
(MAP) decoding is used to recover correlated
and/or non­equiprobable data that has been
channel encoded prior to transmission over very
noisy AWGN and Rayleigh fading channels.
Most compression algorithms leave some resid­
ual redundancy in the output bit stream; this
redundancy -- in the form of memory and/or a
non­uniform distribution -- may be exploited at
the receiver by adjusting the decoding metric.
This approach is demonstrated with a variety

Source: Alajaji, Fady - Department of Mathematics and Statistics, Queen's University (Kingston)

Collections: Engineering