太赫兹科学与电子信息学报
太赫玆科學與電子信息學報
태혁자과학여전자신식학보
Information and Electronic Engineering
2013年
6期
948-952
,共5页
彭华甫%江桦%裴立业%郭峰
彭華甫%江樺%裴立業%郭峰
팽화보%강화%배립업%곽봉
信号识别%连续相位调制%瞬时幅度%谱线检测
信號識彆%連續相位調製%瞬時幅度%譜線檢測
신호식별%련속상위조제%순시폭도%보선검측
modulation identification%Continuous Phase Modulation%instantaneous amplitude%spectrum line test
针对非合作通信系统中连续相位调制(CPM)信号识别难的问题，提出一种CPM信号识别新方法。算法以信号的瞬时幅度谱为特征，结合谱线检测，实现了CPM信号与幅移键控(ASK)、正交幅度调制(QAM)、相移键控(PSK)、频移键控(FSK)信号的区分。算法无需各种参数估计及同步等预处理过程，仿真实验结果表明，在信噪比不小于4 dB时，CPM信号正确识别率达到95%以上。与已有算法相比，本文所提算法具有计算量小、实现简单和低信噪比下识别率高等优点。
針對非閤作通信繫統中連續相位調製(CPM)信號識彆難的問題，提齣一種CPM信號識彆新方法。算法以信號的瞬時幅度譜為特徵，結閤譜線檢測，實現瞭CPM信號與幅移鍵控(ASK)、正交幅度調製(QAM)、相移鍵控(PSK)、頻移鍵控(FSK)信號的區分。算法無需各種參數估計及同步等預處理過程，倣真實驗結果錶明，在信譟比不小于4 dB時，CPM信號正確識彆率達到95%以上。與已有算法相比，本文所提算法具有計算量小、實現簡單和低信譟比下識彆率高等優點。
침대비합작통신계통중련속상위조제(CPM)신호식별난적문제，제출일충CPM신호식별신방법。산법이신호적순시폭도보위특정，결합보선검측，실현료CPM신호여폭이건공(ASK)、정교폭도조제(QAM)、상이건공(PSK)、빈이건공(FSK)신호적구분。산법무수각충삼수고계급동보등예처리과정，방진실험결과표명，재신조비불소우4 dB시，CPM신호정학식별솔체도95%이상。여이유산법상비，본문소제산법구유계산량소、실현간단화저신조비하식별솔고등우점。
In the non-cooperation communications system, it is difficult to recognize Continuous Phase Modulation(CPM) signals. A novel method for the recognition of CPM signals is proposed to solve this problem. By combining spectrum line test, the signals instantaneous amplitude spectrum features are employed to distinguish CPM signals from Amplitude Shift Keying(ASK),Frequency Shift Keying(FSK), Phase Shift Keying(PSK),Quadrature Amplitude Modulation(QAM) signals. The method obviates the requirements of preprocessing tasks like estimation of parameters and synchronization. Simulation results show that the correct classification rate of CPM signals is above 95% under 4 dB SNR. Compared with existing methods,the proposed method which has lower computational costs and higher recognition probability is easy to be implemented.
