Summary: ITW2003, Paris, France, March 31 -- April 4, 2003
Performance Analysis of MAP Decoded Space­Time Orthogonal
Block Codes for Non­Uniform Sources *
Firouz Behnamfar y , Fady Alajaji yz , and Tam’as Linder yz
y Department of Electrical and Computer Engineering, z Department of Mathematics and Statistics
Queen's University, Kingston, Ontario, Canada.
ffirouz, fady, linderg@mast.queensu.ca
Abstract --- We derive a closed­form expression for the
exact pairwise error probability (PEP) of a non­uniform
memoryless binary source transmitted over a Rayleigh
fading channel using space­time orthogonal block codes
and maximum a posteriori (MAP) detection. The expres­
sion is easy to evaluate and holds for any signaling scheme.
We then use this result to minimize the bit error rate of
the binary antipodal signaling scheme. Numerical results
for the case of binary antipodal signaling (BPSK and opti­
mal) verify the accuracy of our formula and quantify sub­
stantial gains of MAP decoding over maximum likelihood
(ML) decoding for sources with strong non­uniformity.
I. INTRODUCTION

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

Collections: Engineering