多通道跳频通信系统的功放线性化

his article aims to propose solutions to the digital predistortion(DPD) problem of power amplifier in multi-channel frequency hopping communication systems. The introduction part includes the introduction of the main features of multi-channel frequency hopping communication(MCFHC) system. Then the first part introduces the traditional DPD method and how to apply it in MCFHC system. The difficulty and innovation of this article lies on the second part. In the second part, the disadvantages of the traditional DPD method are analyzed first. Then the scheme of "Multi-channel cancellation method" is proposed for MCFHC and discussed. The third part first shows how to build the system of predistortion in MATLAB. The whole predistortion scheme is based on Multi-polynomial model and LMS adaptive algorithm to simulate the generated QPSK multi-carrier signal. Finally, the two schemes are simulated and compared to provide simulation results and conclusions.