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Maximum-likelihood-sequence-detection in DFH with its characteristics

GUAN Sheng-yong,YAO Fu-qiang(The 63rd Research Institute of PLA General Staff Headquarters,Nanjing 210007,China)  
In order to apply the maximum-likelihood-detection algorithm(MLDA), the generalized constellation in Doppler's plane were proposed by introducing the frequency reliability function.The generalized constellation makes MLDA possible and can be applied to demodulation of frequency-shift-keying communication system.Simulations show that MLDA provides better performance than that of the most-a-posteriori-possibility detection hop by hop in DFH.
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