分析了认知无线电网络中使用能量检测器进行频谱检测的性能。
We analyzed the performance of spectrum sensing with energy detector in cognitive radio network.
在认知无线电网络中，频谱检测作为一个核心问题受到了广泛的研究。
In cognitive radio networks, spectrum sensing as a core issue has been widely studied.
针对认知无线电网络中多信道特性，提出了一种基于链路质量的多信道路由协议。
Considering the characteristics of cognitive radio networks, this paper proposes a new routing protocol based on link quality for multi-channel cognitive radio networks.
其次，在认知无线电网络中，由于信道的随机性，造成频谱检测过程中的不确定性。
Secondly, the uncertainty during the process of the spectrum detection is caused by the random of the channel in the Cognitive Radio network.
为了解决这个问题，将认知无线电网络分成单跳有簇头结构，通过簇头检测恶意节点。
In order to solve this security problem, cognitive radio networks are divided into single-hop clustering structure, and cluster-head is designed to detect malicious nodes.
第五章对全文进行了总结，并指出了认知无线电网络中的功率控制算法设计未来的研究方向。
Chapter 5 summarizes this thesis and points out the future research direction and the next step of work for the design of power control algorithms in cognitive radio networks.
本文从认知无线电技术特性出发，对认知无线电网络中的功率控制算法进行了较为深入的研究。
From the perspective of characteristic in cognitive radio, this thesis develops a deep research on power control in cognitive radio networks.
但是过多的认知用户参与协同检测，会使整个认知无线电网络的灵敏度降低，同时也会造成巨大的系统开销。
However, too many cooperative users will make the whole sensing time unbearably long and consume huge system resource.
仿真平台设计也是认知无线电网络研究的基础性工作之一，优秀的仿真平台可大大提高研究的有效性和正确性。
Simulation platform is also one of fundamental work of CR research. Excellent simulation platform can greatly enhance the effectiveness and correctness of the research.
针对认知无线电网络中出现的模仿主用户攻击和自私行为攻击问题，提出一种基于簇的分布式认知无线电网络安全体系结构。
To solve the primary user emulation attack and selfish misbehaviors in cognitive radio networks, this paper presents cluster-based security architecture for distributed cognitive radio networks.
在此基础上，第三章，本论文提出了一种新的分布式认知无线电网络多信道MAC协议，并对该协议的系统模型、设计流程和性能做了详细的介绍和分析。
In this paper, a novel multi-channel MAC protocol in cognitive radio network is proposed in chapter 3. System model, design flow and performance of this protocol are introduced and analyzed.
在此基础上，第三章，本论文提出了一种新的分布式认知无线电网络多信道MAC协议，并对该协议的系统模型、设计流程和性能做了详细的介绍和分析。
In this paper, a novel multi-channel MAC protocol in cognitive radio network is proposed in chapter 3. System model, design flow and performance of this protocol are introduced and analyzed.
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