基于USB3.0的GPP软件无线电系统的硬件平台设计

摘要

This paper presents a hardware platform based on USB 3.0 interface for the baseband data transmission of software defined radio (SDR) system with general purpose processor (GPP). The platform which is made up of USB 3.0 controller, FPGA and DDRII implements the baseband data transmission of WCDMA under the requirement of high throughput and low latency. According to our analysis and test, the loopback delay time of the platform is around 0.7 millisecond and the throughput of the platform is up to 200Mb/s, which meets the system requirement of WCDMA.%针对基于通用处理器(GPP)的软件无线电(SDR)系统的基带数据传输问题,提出了一种基于USB3.0接口的WCDMA软件无线电系统的硬件平台.基于WCDMA系统的要求,选择了USB3.0控制器、FPGA和DDRⅡ组成的硬件平台,最终实现了WCDMA系统基带数据的高吞吐率、低延时传输,并验证了USB3.0技术在WCDMA系统中应用的可行性.实验结果表明,在基于USB3.0的GPP软件无线电系统中,USB3.0的接口速率能达到200 Mb/s,系统的回环延迟时间为0.7 ms左右,能够满足WCDMA系统的需求.