基于循环谱的同信道多信号调制方式识别

为满足软件无线电、认知无线电的需要,对共信道多信号的调制方式识别技术进行了研究,提出了一种共信道多信号调制方式识别的数学模型.根据此模型,结合循环谱理论,给出了基于循环谱的同信道多信号调制方式识别算法,并以BPSK、QPSK、OQPSK三种调制方式为例,采用蒙特卡洛方法对提出的算法进行了仿真.仿真和试验结果表明,提出的算法能有效地识别共信道多信号的调制方式,取得了与理论分析相吻合的结果.

Modulation recognition of multisignal in the same channel based on cyclic spectral correlation

To solve the problems in modulation recognition of multisignal in the same channel, we studied the modulaton recognition techniques for mulsiginal in the same channel, and presented a corresponding mathematical model of modulation recognition. Combined with the theory about cyclic spectral correlation, the paper gives a modulation recognition algorithm for multiginal in the same channel based on the presented mathematical model. By taking the three modulation signals of BPSK, QPSK and OQPSK as the examples, the simulation test for the algorithm was done using the Monter-Carlo method. The simulation results were in agreement with the theoretital analysis and proved that the presented algorithm can recognize the modulation types of multisignal in the same channel effectively.