认知超宽带通信系统中的频谱协作感知融合策略

给出了认知超宽带无线通信系统(CUWB)中的协作感知的基本流程,分析了CUWB多用户协作频谱感知的数据融合策略中的硬判决算法和软判决算法。通过分析,发现信道条件较好时,接收信噪比较大时,硬判决的可信度较高,但是当接收信噪比较小时,硬判决的误差就很明显,此时需要引入软判决。通过仿真分析了各融合策略的适用条件,从而达到改善系统的检测性能,降低干扰冲突,提高频谱利用率的目的。

Cognitive ultra-wideband communication systems integration strategy for spectrum sensing aware collaboration

This paper briefly describes the basic processes of spectrum sensing aware（cognitive ultra-wideband wireless communications systems） collaboration,and then analyzed the CUWB multi-user collaborative spectrum sensing data fusion strategy of the hard-decision algorithm and soft-decision algorithm.Through the analysis,we found that the credibility of the hard decision is high under the condition of good chaanel and large signal-to-noise ratio,but when the detected signal-to-noise ratio is small,the hard-decision error is very obvious,thus we need to use soft-decision at this time.Finally we found the conditions for the application of integration strategy to achieve the improvement of the system detection performance,reduce interference conflicts and to improve the spectral efficiency.