中文摘要：

为了识别4种常见调制方式混合信号的调制方式,针对混合信号的特征,提出了在FPGA上实现的混合信号调制识别方案。该方案利用混合信号与单信号的全采样序列星座点以及定时抽样序列弱信号的差异提取特征参数完成信号识别功能。先经MATLAB仿真验证了算法的可行性,又经ModelSim功能仿真验证了算法可用于现场可编程门阵列,最后配合ChipScope软件完成硬件实现测试。实验证明,调制识别算法具有可行性,在信噪比不低于15 dB时对各混合信号的调制识别有着较高的成功率。

英文摘要：

In order to identify the modulation of a composite signal,which contains four kinds of modulation modes,aiming at the characteristics of the composite signal,the modulation recognition scheme for the composite signal was proposed based on FPGA. In the scheme,a set of feature parameters were extracted from the constellation of the whole sampling sequence and the weak signal of the timely sampling sequence based on the differences between mixed signals and single signals. Firstly,the arithmetic feasibility of the scheme was verified by the MATLAB simulation,then the ModelSim simulation was used to verify that the scheme can be used by FPGA. Finally,hardware implementation test was done with the help of ChipScope. Experiments prove that the algorithm is feasible,and the rate of success is considerable when the signal to noise ratio is higher than 15 dB.