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中文摘要：
为了能将认知无线电的理论研究与实物研究较好地结合在一起,基于USRP2平台设计并实现了一个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系统的特殊性提出了一种将传统算法和修剪算法相结合的快速有效的FFT自适应处理算法。软硬件仿真结果表明,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,提出的算法可以有效缩短数据处理时间,提升数据传输的鲁棒性,改善系统的整体性能。
英文摘要：
In order to combine the theory study and material object research together properly,this paper designs and implements a NC-OFDM system of CR based on USRP2,and presents the flow path of both software and hardware in detail,meanwhile,it also presents the solution to the key problems.The paper introduces a fast and effective self-adaption algorithm based on traditional algorithm and Pruning algorithm.The software and hardware simulation results show that this system is available to implement the wireless communication based on the USRP2.And the proposed algorithm not only can reduce the time of dealing with data effectively,but also can improve the robust of data transmitting and enhance the performance of the whole system.
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