基于高速数字逻辑门16QAM调制与解调算法优化

16QAM modulation based on high speed digital logic gate and optimization with demodulation algorithm

为了降低毫米波通信系统的成本和功耗,文中提出了基于高速数字逻辑门的16QAM调制方法,对该方法产生的16QAM信号进行相干解调,并且结合平方环改进传统的科斯塔斯环路载波恢复方法。与传统调制解调方法相比,文中提出的调制方法避免使用数模转换器,简化了系统结构,降低了系统成本。仿真结果表明,改进的科斯塔斯环路同步频率的收敛速度比传统的科斯塔斯环路提高了约一倍,并且系统误码率性能与理论值一致。

In order to reduce the cost and power consumption of the millimeter wave communication system,a 16QAM modulation method based on high-speed digital logic gate is proposed.The 16QAM signal generated by the method is coherently demodulated,and the traditional Costas loop carrier with the square ring is improved.Compared with the traditional modulation and demodulation method,the modulation method avoids the use of digital-to-analog converter,which simplifies the system structure and reduces the system cost.The simulation results show that the convergence rate of the improved Costas loop synchronization frequency is higher than that of the traditional Costas loop,and the system error rate performance is consistent with the theoretical value.