基于认知无线电平台的NC-OFDM系统设计与实现

摘要

This paper designed and implemented a NC-OFDM system of CR based on USRP2, and it presented the flow path of both software and hardware in detail,in the meanwhile, it also presented the solution to the key problems. This paper introduced a fast self-adaption algorithm to restrain the peak-to-average power ratio. The hardware simulation results show that this system is available to implement the wireless communication based on the USRP2. And it presented foundation to converting the theory study to the practical application of CR. This system had properly practical value, it also presented useful example for other designs of wireless communication systems based on USRP2.%基于USRP2平台设计并实现了一个非连续正交频分复用(NC-OFDM)认知无线电传输系统,给出了系统的软硬件设计详细流程和关键问题的解决方案,并针对NC-OFDM系统提出了一种快速抑制峰均比的自适应算法.硬件仿真结果表明,本系统能够在USRP2平台上成功实现无线通信的数据传送与接收,为认知无线电由理论研究迈向实际应用奠定了基础,有一定的实用价值,同时也为其他基于USRP2的无线系统设计提供了有益借鉴.