CAJ | 학술논문

以Matlab提供的可视化仿真工具Simulink搭建直接序列扩频通系统仿真模型，利用Simulink对直接序列扩频通系统的发射机模块和接收机模块进行仿真设计，通过传输过程中各个波形和频谱变换图，研究直扩系统误码率、信噪比和扩频增益的关系。在给定的仿真条件下，运行测试仿真模型，结果表明，该系统信噪比较高，性能较好，且在误码率保持不变的情况下，增加直扩通信系统的扩频增益可以增加输出端的信噪比。
이Matlab제공적가시화방진공구Simulink탑건직접서렬확빈통계통방진모형，이용Simulink대직접서렬확빈통계통적발사궤모괴화접수궤모괴진행방진설계，통과전수과정중각개파형화빈보변환도，연구직확계통오마솔、신조비화확빈증익적관계。재급정적방진조건하，운행측시방진모형，결과표명，해계통신조비교고，성능교호，차재오마솔보지불변적정황하，증가직확통신계통적확빈증익가이증가수출단적신조비。
The visual simulation tool Simulink provided by Matlab is used to build a simulation model of direct sequence spread spectrum communication system. The simulation design of transmitter module and receiver module of direct sequence spread spectrum communication system was carried out with Simulink. The relationship among BER,SNR and spreading gain of DSSS system was researched by means of every waveform and spectrum transformation diagram in the transmission process. The simulation model was tested under the given simulation conditions. The results show that the system has high SNR,good perfor-mance and constant bit error rate;and the signal-to-noise ratio at the output end can be improved if the spread gain of the direct sequence spread spectrum communication systems is increased.