不对称的随机极性甚小幅相调制系统

为了紧缩随机极性MCP-EBPSK调制信号的频谱，消除边带线谱，同时易于电路实现和芯片集成，提出了一种不对称的随机极性甚小幅相调制(ARP-VMAP)。该方法是对随机极性MCP-EBPSK调制的波形表达式进行了简化和近似，消除了超越函数，使得调制器更容易硬件实现，工作频率更高。仿真结果表明:即使在-74dB边带功率带宽的苛刻要求下，ARP-VMAP调制能完全去除已调信号功率谱中的线谱分量，获得比随机极性MCP-EBPSK更高的频谱利用率，且解调性能也显著提高，对于发射能量的利用率更高，有利于节能环保。 

Asymmetry and Random-Polar Very Minimum Amplitude Phase Modulation System

To narrow the signal spectrum of a random-polar and modified CP-EBPSK (MCP-EBPSK) modulation and eliminate the discrete components in spectral sideband, an asymmetry and random-polar very minimum amplitude phase modulation (ARP-VMAP) is proposed. This modulation is prone to circuit implementation and chip integration. The method of this modulation is a simplification and approximation of the waveform expressions of random-polar MCP-EBPSK modulation by eliminating its transcendental function, which makes the modulator easier to circuit implementation and higher in carrier frequencies. The simulation results show that even in the severe condition of the -74dB power spectral bandwidth, the ARP-VMAP modulation can remove the discrete component in power spectrum of the modulated signal, get higher spectrum efficiency and much better demodulation performance than random-polar MCP-EBPSK modulation. As a result the ARP-VMAP modulation can successfully make the utilization rate of the launch energy higher than before and has the advantage in energy conservation and environmental protection