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A theoretic approach to the belief-propagation - based weighted bit-flipping (BP-based WBF) algorithm is proposed for decoding low-density parity-check codes. The decoding algorithm can be easily simplified to IMWBF, MWBF, WBF or BF decoding algorithms by setting different parameters; hence it could offer a high flexible performance/complexity trade-off for(More)
A systematic frequency domain design approach is presented for designing multidimensional recursive digital filters that approximate prescribed ideal frequency response specifications. The composite property mapping algorithm is used to generate a frequency response matrix which possesses properties associated with a recursive filter. This design procedure(More)
This paper proposes a method for recognizing M-ary frequency-shift-keyed (MFSK) orthogonal modulation received in additive white Gaussian noise. Under the circumstance of lack the knowledge of signal characteristic, the modulation types are estimated to provide sufficient information for communication intelligence and electronic warfare applications. The(More)
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