基于甚小线性调频键控波形的mQAM调制方案

A New QAM Modulation Scheme Based on Very Minimum Chirp Keying

研究基于甚小线性调频键控波形的多进制正交幅度调制方案,对传统多进制正交幅度调制结构进行改进,从而能在一个信号周期中多传输1bit的信息。同时根据VMCK-m QAM调制的特点,提出了一种判别VMCK波形升降频的方法,对这种新型调制方案进行了误码率性能仿真。VMCK-mQAM与m QAM相比,误码率相同而传输率多1bit,而与2mQAM相比,在传信率和误码率都相同时,信噪比可低3d B。

This paper proposes a new Multiple Quadrature Amplitude Modulation scheme based on the Very Minimum Chirp Keying waveform,and improves on the traditional structure to transmit one more bit information.At the same time,according to the characteristic of VMCK-m QAM modulation,a method to recognize the up and down of VMCK waveform frequency is proposed.The BER performance of this new modulation scheme is analyzed.With the same bit error rate,VMCK-mQAM can transmit one more bit than mQAM in one signal period.With the same transmission rate and the same bit error rate,compare to 2mQAM,the signal to noise ratio of VMCK-m QAM can be low 3d B.