基于FPGA的宽带双波段信号捕获与恢复技术  

Acquisition and Recovery Techniques of Broadband Dual-Band Signal Based on FPGA

作　　者：杨延嗣 刘太君[1] 叶焱[1] 单月忠 许高明[1] 

机构地区：[1]宁波大学通信技术研究所,浙江宁波315211

出　　处：《移动通信》2015年第2期74-78,共5页Mobile Communications

基　　金：国家自然科学基金项目(61171040);浙江省自然科学基金(Y1101270)

摘　　要：在结合混合滤波器组和宽带双波段信号特性下,提出了基于FPGA的宽带双波段信号捕获与恢复的设计方法,解决了单片ADC采样带宽不足的问题,并提高了采集信号的无杂散动态范围。采用三载波WCDMA信号作为低频段和高频段的测试信号,通过FPGA硬件平台上进行了实验验证。实验结果表明:一方面,当单片ADC采样带宽大于双波段信号带宽时,采用2-D技术得到的信号无杂散动态范围优于单片ADC采样得到的;另一方面,本设计方案可以扩展双波段信号的采集带宽。Combined with hybrid filter banks and broadband dual-band signal characteristics, the acquisition and recovery design techniques of broadband dual-band signal based on FPGA are proposed in this paper, which properly deal with the insufficient bandwidth of ADC sampling and enhance the spurious-free dynamic range （SFDR） of the sampling signal. The three-carrier WCDMA signal is used as the test signals at both low and high frequency bands, and it is validated on FPGA platform. Experimental results show that when the sampling bandwidth of monolithic ADC is greater than the bandwidth of dual-band signal, the SFDR of 2-D technique is superior to monolithic ADC. In addition, the proposed scheme is able to extend the acquisition bandwidth of dual-band signal.

关 键 词：宽带双波段信号 ADC FPGA 2-D技术 数字变频 

分 类 号：TN929.5[电子电信—通信与信息系统]