论文部分内容阅读
共用同一频段的通信卫星和地面微波中继系统间的相互干扰,是有效利用功率/频谱及卫星轨道间隔的最主要的限制因素。因此,预测这种相互干扰影响对解决频谱及轨道拥塞问题具有重要意义。 本文主要对M相相干移相键控(MCPSK)这类数字传输系统进行干扰性能分析,并寻求一种很有用的计算机工程计算途径。在进行一般干扰分析的基础上,强调指出数值计算和计算机模拟相组合这种计算技术的有效性。利用这种技术,对存在加性噪声、干扰及固定传输恶化等,均容易取得有效的工程计算结果。数值实例表明,其结果与纯数值计算的严格分析结果很好地相吻合。已研制了相应的通用计算机程序。文中描述了有关计算方法,给出了相应的计算结果及工程曲线,并阐明了对数字微波通信干扰分析及协调估计的一些可能应用途径。
Mutual interference between communications satellites sharing the same frequency band and terrestrial microwave relay systems is the most important limiting factor for the efficient use of power / spectrum and satellite orbital separation. Therefore, it is of great significance to predict the impact of such mutual interference to solve the problem of spectrum and orbital congestion. In this paper, we mainly analyze the interference performance of digital transmission systems such as M-phase coherent phase shift keying (MCPSK), and find a useful way to calculate computer engineering. On the basis of general interference analysis, it is emphasized that the computational techniques of numerical computation and computer simulation are effective. With this technology, it is easy to obtain effective engineering calculations for the presence of additive noise, interference and deterioration of fixed transmission. Numerical examples show that the results are in good agreement with the rigorous analysis of pure numerical calculations. The corresponding general computer program has been developed. The calculation method is described in this paper, the corresponding calculation results and engineering curves are given, and some possible applications of interference analysis and coordination estimation for digital microwave communication are clarified.