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In this paper, a new state metric normalization technique is proposed for maximum-a-posteriori-probability (MAP) algorithm to enhance the throughput of MAP decoder. Bit-error-rate (BER) performance comparison showed that the MAP algorithm based on the proposed normalization technique has a coding gain of 0.25 dB at a BER of 10−4 in comparison with MAP algorithm based on the subtractive normalization...
In this paper we analyse the Bit Error Rate(BER) performance and energy efficiency of Luby Transform (LT) codes when the signals are Binary Phase shift Keying (BPSK )modulated with varying thresholds and transmitted over the Free Space Optical (FSO)Channel in a wireless sensor network. We model the FSO channel using the Gamma-Gamma distribution function and compare the performance for varied turbulence...
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