本文選題：分形理論 + 調(diào)制識(shí)別�。� 參考：《河北大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年06期

【摘要】：針對(duì)數(shù)字調(diào)相和調(diào)頻識(shí)別問題,提出采用調(diào)制信號(hào)絕對(duì)值的瞬時(shí)幅度的盒維數(shù)作為多進(jìn)制數(shù)字相位調(diào)制(MPSK)和多進(jìn)制數(shù)字頻率調(diào)制(MFSK)信號(hào)類間識(shí)別的特征參數(shù),并采用擬合曲線作為判決門限,該方法在保持具有較少的特征參數(shù)的同時(shí)還增強(qiáng)了對(duì)噪聲的魯棒性.在調(diào)制信號(hào)的類內(nèi)識(shí)別中,分別采用MPSK信號(hào)的瞬時(shí)相位的盒維數(shù)和MFSK信號(hào)的瞬時(shí)頻率的盒維數(shù)作為特征參數(shù).仿真結(jié)果表明,在信噪比為5dB時(shí),對(duì)信號(hào)進(jìn)行完全識(shí)別的正確率可以達(dá)到90%以上,從而證明了該方法的有效可行性.
[Abstract]:In order to solve the problem of digital phase modulation and frequency modulation recognition, the box dimension of the absolute value of modulation signal is used as the characteristic parameter of MPSKs and MFSKs, which can be recognized by multi-ary digital phase modulation (MPSKK) and multi-ary digital frequency modulation (MFSKK). The fitting curve is used as the decision threshold. This method not only keeps less characteristic parameters, but also enhances the robustness to noise. The box-dimension of instantaneous phase of MPSK signal and the dimension of instantaneous frequency of MFSK signal are used as characteristic parameters in in-class recognition of modulation signal. The simulation results show that when the SNR is 5dB, the correct rate of complete recognition can reach more than 90%, which proves the validity of the method.
【作者單位】： 河北大學(xué)電子信息工程學(xué)院;
【基金】：河北省自然科學(xué)基金資助項(xiàng)目(F2013201170)
【分類號(hào)】：TN911.3
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本文編號(hào)：1938815