Naveed Ur Rehman and Rehan Jamil and Irfan Jamil
Effect of Different BER Performance Comparison of MAP and ML Detection
1531 - 1534
2014
8
9
International Journal of Electronics and Communication Engineering
https://publications.waset.org/pdf/10000773
https://publications.waset.org/vol/93
World Academy of Science, Engineering and Technology
In this paper, we regard as a coded transmission over a
frequencyselective channel. We plan to study analytically the
convergence of the turbodetector using a maximum a posteriori
(MAP) equalizer and a MAP decoder. We demonstrate that the
densities of the maximum likelihood (ML) exchanged during the
iterations are esymmetric and outputsymmetric. Under the Gaussian
approximation, this property allows to execute a onedimensional
scrutiny of the turbodetector. By deriving the analytical terminology
of the ML distributions under the Gaussian approximation, we confirm
that the bit error rate (BER) performance of the turbodetector
converges to the BER performance of the coded additive white
Gaussian noise (AWGN) channel at high signal to noise ratio (SNR),
for any frequency selective channel.
Open Science Index 93, 2014