中译英翻译,求整理句子近十几年来,卫星通信由于覆盖区域大,信道容量大和具有多址联接能力等优点, 已成为国际和国内远距离通信的重要手段.自美国率先建立了卫星通信网后,许多国家也纷

中译英翻译,求整理句子近十几年来,卫星通信由于覆盖区域大,信道容量大和具有多址联接能力等优点, 已成为国际和国内远距离通信的重要手段.自美国率先建立了卫星通信网后,许多国家也纷
中译英翻译,求整理句子
近十几年来,卫星通信由于覆盖区域大,信道容量大和具有多址联接能力等优点, 已成为国际和国内远距离通信的重要手段.自美国率先建立了卫星通信网后,许多国家也纷纷建立了自己的国内卫星通信网.卫星通信业务不断扩大,卫星通信技术也随之飞速发展.目前,在卫星通信中,用数字信号进行通信已成为十分重要的技术.随着数字通信技术的日益发展和广泛应用,数字调制技术作为这个领域中极为重要的一个方面,也得到了迅速发展.众所周知,一个通信系统的质量在很大程度上依赖于所采用的调制方式.本文主要是研究卫星通信系统中的UQPSK调制方式,根据其与BPSK、QPSK的关系分别对BPSK、QPSK及UQPSK进行了仿真.另外,本文对加入噪声的UQPSK的误码性能进行了测试.由于UQPSK的研究内容比较少,因此本文对了解UQPSK调制方式具有重要的指导意义.
关键词： UQPSK, Matlab/Simulink,仿真,误码
求翻译,拒绝机器翻译,可以机器翻译然后整理,谢谢,重谢,采纳后加30分再

中译英翻译,求整理句子近十几年来,卫星通信由于覆盖区域大,信道容量大和具有多址联接能力等优点, 已成为国际和国内远距离通信的重要手段.自美国率先建立了卫星通信网后,许多国家也纷
拒绝机译,
For the past ten years,satellite communication has become the important means of international and domestic telecommunication because the coverage area is big,and has ability of multi-access connection etc.many countries have set up their own domestic satellite communications network since the United States established the first one.Satellite communications business continues to expand,satellite communications technology follows the development.At present,in satellite communications,It has become a very important technique with digital signal communication .Along with the digital communication technology development and the widespread application,digital modulation technology develop rapidly
as the important factor in the field.As is known to all,quality of a communication system depends heavily on the modulation mode.This paper mainly studies UQPSK modulation mode in the satellite communication system ,according to its relationship with QPSK BPSK,respectively simulate UQPSK BPSK,QPSK .In addition,this paper tests the BER of UQPSK joined the noise .Because the research of UQPSK are few,so this paper has important guiding significance to understand tne method of UQPSK modulation .
Keywords:UQPSK,Matlab/Simulink,simulation,error