英语翻译设计使用MATLAB软件,利用一周期m序列对一定周期的方波信号进行了仿真和分析.从扩频通信系统的组成原理及特点、

英语翻译
设计使用MATLAB软件,利用一周期m序列对一定周期的方波信号进行了仿真和分析.从扩频通信系统的组成原理及特点、主要性能指标、直接序列扩频通信系统、伪随机序列、实现扩频的方法等方面阐述了扩频通信的相关知识,着重对直扩系统的性能进行了理论分析和仿真研究.设计从理论上分析了直接序列扩频通信系统的系统框图、直接序列扩频信号的产生原理及其解调、窄带干扰对解扩的影响,并通过编辑MATLAB中的代码实现了扩频通信系统的仿真.将方波信号扩频,而后进行调制与解调,最后使信号通过低通滤波器,过滤掉它的高频部分,从而恢复出所期望的信号,并与原始方波信号进行对照.结果显示,两者具有一致性,信号频谱基本相同,达到了预期的效果.

设计使用MATLAB软件,利用一周期m序列对一定周期的方波信号进行了仿真和分析.从扩频通信系统的组成原理及特点、主要性能指标、直接序列扩频通信系统、伪随机序列、实现扩频的方法等方面阐述了扩频通信的相关知识,着重对直扩系统的性能进行了理论分析和仿真研究.
With the application of MATLAB software, this design used a cycle of m sequence to simulate and analyze a certain cycle of square wave signals. The relevant knowledge of spread spectrum communication was elaborated from various aspects, such as the composition principles and characteristics of spread spectrum communication system, its major performance index and its direct sequence, pseudo random sequence and the methods of implementing spread spectrum; particular emphasis was focused on the theoretical analysis and simulation study of the performance of DS spread spectrum system.
设计从理论上分析了直接序列扩频通信系统的系统框图、直接序列扩频信号的产生原理及其解调、窄带干扰对解扩的影响,并通过编辑MATLAB中的代码实现了扩频通信系统的仿真.将方波信号扩频,而后进行调制与解调,最后使信号通过低通滤波器,过滤掉它的高频部分,从而恢复出所期望的信号,并与原始方波信号进行对照.
This design theoretically analyzed the system chart of DS spread spectrum system, its signal’s generation principles and demodulation, the impact of narrowband interference on de-spreading, and the realization of the spread spectrum communication system simulation by editing the MATLAB codes. Then, spread spectrum was conducted on the square wave signals, followed by modulation and demodulation, and finally, the signals were filtered to remove the high frequency parts by low pass filter, so as to regenerate the desired signals and to compare them with the original square wave signals.
结果显示,两者具有一致性,信号频谱基本相同,达到了预期的效果.
The result shows that there is consistency in both signals, their frequency spectrums are basically the same and the expected result is achieved.
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