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中文摘要：
针对无先验信息的MFSK（M-ary frequency shift keying）信号提出了一种基于小波变换的盲解调算法。该算法基于morlet小波脊线值与MFSK信号符号之间的对应关系，研究了小波脊线提取、符号率估计、符号同步、调制进制M识别、调制码估计等算法，实现了盲信号的解调。仿真结果表明：2FSK信号的盲解调性能比理论值恶化不超过0．1dB；4FSK信号的盲解调性比理论值恶化约1dB。
英文摘要：
The paper proposes a blind demodulation algorithm based on wavelet transform which demodulates MFSK（M-ary frequency shift keying）signal without any prior information. According to relationship between the values of morlet＇s wavelet ridges and MFSK symbols, the wavelet ridge extraction, symbol rate estimation, clock synchronization, modulation level identification and symbol identification are accomplished simultaneously in this algorithm. Simulation results demonstrate that the performance degradation of the blind demodulation is only about 0. 1 dB and 1 dB for 2FSK and 4FSK signals, respectively, with respect to the theory bound.
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