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Forward error correction of FSK alphabets for noncoherent transmissions over AWGN channel

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3 Author(s)
Durand, C. ; ComElec Dept., ENST Univ., Paris, France ; Boutros, J. ; Bejjani, E.

We show that several coding schemes, in particular turbo encoding, dramatically improve the performance of a noncoherently detected frequency shift-keying modulation with correlated signals. The proposed a posteriori probability (APP) decoder based on bit-by-bit decisions proves to be highly flexible and more efficient than a classical block decisions decoding scheme. Moreover, the choice of the FSK modulation tone spacing is important. Simulation results show that the turbo-coded FSK exhibits the lowest error probability when compared to TCM, convolutional and lattice encoding schemes.

Published in:

Communications Letters, IEEE  (Volume:4 ,  Issue: 10 )