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高速无线通信系统中,Chirp信号作为一种新的超宽带信号,既能实现高速数据传输,又能满足精确定位的要求。借助MATLAB仿真工具,阐述Chirp信号的时频特性以及匹配滤波过程,利用Chirp信号匹配滤波后的压缩特性,对匹配滤波进行仿真。仿真结果显示Chirp信号经匹配滤波器后脉冲宽度被大大压缩,信噪比得到显著提高,与理论分析相吻合。设计了Chirp信号超宽带无线通信系统,仿真得到在AWGN下匹配滤波接收的系统误码率与信噪比关系图,分析了将线性调频扩频CSS(Chirp Spread Spectrum)技术应用到高速无线超宽带通信中的可行性。
High-speed wireless communication system, Chirp signal as a new ultra-wideband signal, both for high-speed data transmission, but also to meet the precise positioning requirements. With the aid of MATLAB simulation tools, the time-frequency characteristics of Chirp signal and the matching filtering process are described. The matching filtering is simulated by using Chirp signal to match the filtered compression characteristics. The simulation results show that the pulse width of the Chirp signal is greatly compressed after the matched filter, and the signal-to-noise ratio is significantly improved, which is in good agreement with the theoretical analysis. The Chirp signal ultra-wideband wireless communication system is designed and the relationship between BER and signal-to-noise ratio of matched filter reception under AWGN is simulated. The application of Chirp Spread Spectrum (CSS) technology to high-speed wireless ultra-wideband Feasibility in communication.