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Fast frequency hopping (FFH) is a very effective way to combat jamming. In this paper, low density parity check (LDPC) code is combined with diversity-combining techniques to enhance the performance of FFH systems under band multitone jamming (BMTJ). The optimum maximum-likelihood (ML) combining which needs perfect side information (SI), and various suboptimum combinings which need partial or no SI,...
An iterative decoding scheme with diversity is proposed for LDPC coded FFH/MFSK system under partial-band interference. The performance gain is obtained by soft-information exchange between demodulator and decoder. Extrinsic information transfer (EXIT) chart is employed to study the iterative procedure, which indicates that the convergence speed of the system is fast. The simulation results show the...
In this letter, we point out that the simulation results in the above paper are partially incorrect, and the product combining receiver outperforms the other suboptimal ones.
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