CAJ | 학술논문

扩频系统接收机的好坏直接决定了整个通信系统的性能．在直接序列扩频通信系统的基础上，提出了一种位同步方法，结合科斯塔斯（Costas）环的载波同步方法和数字匹配滤波器的扩频码同步方法，建立了直接序列扩频通信系统模型．最后，采用MATLABR2006b／SIMUUNK工具，对该系统进行整体仿真．本系统经过仿真，验证其正确性，为以扩频通信为基础的现代通信的研究和设计提供参考．
확빈계통접수궤적호배직접결정료정개통신계통적성능．재직접서렬확빈통신계통적기출상，제출료일충위동보방법，결합과사탑사（Costas）배적재파동보방법화수자필배려파기적확빈마동보방법，건립료직접서렬확빈통신계통모형．최후，채용MATLABR2006b／SIMUUNK공구，대해계통진행정체방진．본계통경과방진，험증기정학성，위이확빈통신위기출적현대통신적연구화설계제공삼고．
The quality of spread spectrum receiver directly determines the performance of the whole communi- cation system. Based on the communication system of DSSS （ Direct Sequence Spread Spectrum）, this paper propo- ses a bit-synchronization method and builds a communication system model of DSSS, combining the carrier-synchro- nization method of Costas loop and the spread spectrum code-synchronization method of DMF （Digital Matched Fil- ter）. At last, simulation of spread spectrum system is implemented with MATLAB R2006b. The simulation result shows that this communication system is precise and has some reference significance for the simulation and design of modern communication system based on spread spectrum communication.