基于射频采样的大带宽收发信机的设计与实现

Design and implementation of large bandwidth transceiver based on RF direct sampling

随着工信部发布5G频谱规划,全球5G在中频段上基本都采用3.5 GHz(3 400～3 600 MHz)这个频段。与之前的2G、3G、4G制式相比,它具备远超以往的信号带宽。这里针对5G的新频谱规划,提出了一个基于射频直接采样的大带宽收发信机方案,该方案采用了TI公司的射频直接采样模拟前端芯片AFE7689和Xilinx公司的Zynq-7000系列可扩展处理平台。首先输入射频信号先经过AFE7689射频直接采样,然后通过FPGA进行接收并做简单滤波,最后输出到AFE7689并射频DAC转换为射频输出。通过硬件制作和软件编写对方案进行了验证,从实际测试结果来看,所述的大带宽收发信机方案切实可行。

With the Ministry of publishing 5G spectrum planning,most of the country in the world use 3.5 GHz(3 400~3 600 MHz)for 5G in medium frequency band.Compared with the previous 2G,3G,4G,its signal bandwidth is far more than the previous.In this paper,a large bandwidth transceiver scheme based on RF sampling is proposed for 5G new spectrum planning.It adapts the TI company's RF sampling analog front-end chip AFE7689 and Xilinx company's Zynq-7000 series scalable processing platform.First,the input RF signal is RF sampling by AFE7689,then FPGA receive and filter it,finally,it’s converted to RF output through RF DAC integrated in AFE7689.The scheme is validated by hardware fabrication and software programming,and from the actual test results,the large bandwidth transceiver scheme described in this paper is feasible.