谁能帮我翻译一下论文摘要啊?汉译英,不要在线翻的!谢谢!
谁能帮我翻译一下论文摘要啊?汉译英,不要在线翻的!谢谢!
短波极低信噪比条件下的数据传输在军事上是最低保障通信的一种手段.它具有抗干扰和抗多径能力强,频谱利用率高,信号隐蔽等一系列优点.
本论文采用直接序列扩频技术,重点对短波通信与直接序列扩频通信的特点以及结合的好处,扩频码的产生,直接序列扩频通信系统的技术与原理,扩频同步技术,RAKE接收技术进行了研究与分析.根据自己所学的知识并结合自己的能力,设计出了一种极低信噪比条件下的短波DS—SS通信系统.并用数学软件对系统进行了初步模块化的设计与仿真,为实际的系统设计奠定了理论基础.
Under the short wave extremely low signal-to-noise ratio condition data transmission militarily is the lowest safeguard correspondence one method.It has the antijamming and anti-multi-diameter ability,the frequency spectrum use factor is high,signal hiding and so on a series of merits.The present paper uses the direct sequence spread spectrum technology,key to short-wave communication and direct sequence spread spectrum correspondence characteristic as well as union advantage,wide frequency code production,the direct sequence spread spectrum communications system technology and the principle,the wide frequency synchronization technology,the RAKE receive technology has conducted the research and the analysis.The knowledge studies which according to oneself and unifies own ability,designed under one kind of extremely low signal-to-noise ratio condition short wave DS-SS communications system.And has carried on the preliminary modular design and the simulation with mathematics software to the system,has laid the rationale for the reality system design.