eng Science and Education Publishing American Journal of Electrical and Electronic Engineering 2328-7357 2019-07-26 7 2 42 48 10.12691/ajeee-7-2-4 AJEEE2019724 article Yinsen Jia 1 Xinqi Tu 1 Wei Yan 61197@njnu.edu.cn 1 2 Enrong Wang 2 Yang Zhao 2 Shuqing Ding 3 School of Electric and Automation Engineering Nanjing Normal University, Nanjing, Jiangsu 210042, China Nanjing Special Equipment Inspection Institute, Nanjing, 210002, China UAVs have many functions in detection, fire protection, communication, etc. in modern life, but the complex electromagnetic environment has a very bad impact on the UAV communication link. In this paper, the BPSK modulation and demodulation method of the UAV downlink communication link was analysed. Some typical electromagnetic pulse models were established, including sinusoidal pulse, square wave pulse, triangular wave pulse, Gaussian noise, electric fast transient pulse and surge pulse. The amplitude of different electromagnetic pulses was analysed when UAV communication error rate achieve 5%. Furthermore, the influence on the transmission image quality via UAV downlink was analysed with different electromagnetic pulses, which will provide a theoretical basis for the anti-interference optimization design of UAV communication links in the future. http://pubs.sciepub.com/ajeee/7/2/4/ajeee-7-2-4.pdf UAV communication link electromagnetic pulse BPSK bit error rate