| 摘要: |
| 传统的基于中继的合作频谱感知方法只能实现"一对一"的合作,合作效率较低,合作的检测性能稳定性较差。为此,提出了一种新的方法。该方法通过中继用户转发授权用户的信号,实现网络中一个认知用户与多个认知用户之间的合作。然后采用Dempster-Shafer综合判决理论来综合多个判决信息。仿真结果表明,通过该方法能够改善网络中认知用户的检测性能,并且具有更好的可靠性。 |
| 关键词: 认知无线电 频谱感知 中继 合作 D-S综合判决 检测性能 |
| DOI： |
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| 基金项目:重庆市自然科学基金
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| A Cooperative Spectrum Sensing Technique Based on Relay-transmission for Cognitive Radio |
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| Abstract: |
| The traditional cooperative spectrum sensing based on relay-transmission just realizes one-to-one cooperation in which cooperative efficiency is low and stability of measuring performance is bad.This paper presents a new method to achieve cooperation between one user and multi-user through relaying authorized user's signal by relay-user.Then the Dempster-Shafer comprehensive decision theory is used to combine multiple decision information.The simulation results show that this method can improve the detection performance of cognitive radio(CR) and has better reliability. |
| Key words: cognitive radio(CR),spectrum sensing,relay,cooperation,D-S comprehensive decision,detection performance |
