该文首先对认知无线电系统中基于图论着色的频谱分配模型及其数学符号描述进行介绍；

This paper firstly introduce the cognitive radio system based on the spectrum allocation of graph coloring model and mathematical symbols descriptions;

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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.

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本文首先对认知无线电系统这个大环境的背景、概念、国内外研究现状及关键技术做了详细的分析。

Firstly this thesis introduces the context and concept of cognitive radio, the key technologies of cognitive radio, and the research status at home and abroad on cognitive radio.

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