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Iterative Decision-Feedback Differential Demodulation of MDPSK Concatenated with LDPC Codes |
Zhu Ai-min; Wu Tuan-feng |
Institute of Communications Engineering, PLAUST, Nanjing 210007, China |
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Abstract A receiver structure of M-ary Differential Phase-Shift Keying (MDPSK) concatenated with Low-Density Parity Check Codes in flat Rayleigh fading channels is proposed. An iterative hard decision-feedback detection algorithm also is analyzed ignorant of channel state information. Compared with conventional differential demodulation decoding one, this algorithm almost has no increasing in complexity and simulation results also confirm that it has 2.2dB gain at BER of 10-4 when iterative four times.
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Received: 29 June 2006
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