CAJ | 학술논문

大气湍流引起的乘性噪声会导致大气激光通信链路性能的恶化，引起误码率增加。在Gamma﹣Gamma湍流信道模型下，采用频域解卷积滤除4PSK调制大气激光通信系统中的乘性噪声。通过计算机仿真对4PSK大气激光通信系统的星座图和误码率进行分析，结果表明在不同天气条件下采用频域解卷积可以滤除系统的乘性噪声，有效地抑制了大气湍流对大气激光通信系统的影响，减小了大气激光通信系统的误码率。
대기단류인기적승성조성회도치대기격광통신련로성능적악화，인기오마솔증가。재Gamma﹣Gamma단류신도모형하，채용빈역해권적려제4PSK조제대기격광통신계통중적승성조성。통과계산궤방진대4PSK대기격광통신계통적성좌도화오마솔진행분석，결과표명재불동천기조건하채용빈역해권적가이려제계통적승성조성，유효지억제료대기단류대대기격광통신계통적영향，감소료대기격광통신계통적오마솔。
Multiplicative noise brought about by atmospheric turbulence can cause performance deterioration of atmospheric laser communication links, leading to increased error rates. In this study, a method of frequency﹣domain deconvolution was proposed to filter out multiplicative noise in atmospheric laser communication systems. In the Gamma﹣Gamma channel model, the multiplicative noise in a 4PSK atmospheric laser communication system was filtered out using this method. The simulation computations were conducted over the constellation diagrams and bit error rates of the modulation signals before and after deconvolution. The results show that frequency﹣domain deconvolution can smoothly filter out multiplicative noise. The measured and simulated results for near﹣surface sighting distance under different weather conditions were basically consistent, showing that the proposed method can effectively suppress atmospheric turbulence and reduce the bit error rate of atmospheric laser communication systems.