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论述了带通信号采样定理,在对带通采样后的频谱结构做了详细分析的基础上,提出中频频率、采样频率的选取方法。将带通欠采样技术运用到软件无线电中频接收机设计中,并给出了带通采样定理在的不同条件下Matlab仿真的结果,验证了带通采样技术在宽带数字多通道、多速率、多模式软件无线电中频接收机设计中的可行性和实用性,在工程应用中具有较大的参考意义。
After discussing the band-pass signal sampling theorem, the frequency structure of the band-pass sampling is analyzed in detail, and the selection method of IF frequency and sampling frequency is put forward. The band-pass under-sampling technique is applied to the design of the IF receiver for the software radio. The simulation results of the band-pass sampling theorem under different conditions are given. The results show that the band-pass sampling technique is effective in wideband digital multi-channel, multirate, Mode software radio IF receiver design feasibility and practicality in engineering applications have a greater reference value.