| 基于SIMULINK的高动态下直序扩频通信系统的仿真 |
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| 引用本文： | 张晋,赵刚.基于SIMULINK的高动态下直序扩频通信系统的仿真[J].四川理工学院学报(自然科学版),2009,22(3):90-92. |
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| 作者姓名： | 张晋 赵刚 |
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| 作者单位： | 四川大学电子信息学院,成都,610064 |
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| 摘 要： | 在扩频通信中,伪码的同步与否决定着通信的成功与否。而伪码的同步主要通过相关峰的幅度来判别。在高动态环境下,多普勒频移会对相关峰的幅度产生巨大的影响。只有适度补偿这些影响后才能完成同步。本系统采用基于FFT的多普勒频率估计方法,完成了在多普勒频移情况下的扩频同步。仿真结果验证了方法的有效性。
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| 关 键 词： | SIMULINK 扩频通信 高动态 多普勒频率估计 捕获 |
Simulation of Direct Sequence Spreading Spectrum System Under Highly Dynamic Environment Based on SIMULINK |
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| ZHANG Jin,ZHAO Gang.Simulation of Direct Sequence Spreading Spectrum System Under Highly Dynamic Environment Based on SIMULINK[J].Journal of Sichuan University of Science & Engineering:Natural Science Editton,2009,22(3):90-92. |
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| Authors: | ZHANG Jin ZHAO Gang |
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| Institution: | School of Electronics and Information Engineering;Sichuan University;Chengdu 610064;China |
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| Abstract: | In spreading spectrum system,whether the communication is built successfully or not is decided by the synchronization of pseudorandom code.What is more,the synchronization is finished or not is decided by the peak of correlation of pseudorandom code.Under highly dynamic circumstance,the peak is highly influenced by Doppler frequency shift.So we take the way of FFT to evaluate frequency and finish the synchronization.The simulation results approve the effectiveness of this method. |
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| Keywords: | SIMULINK |
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