变换域通信系统双门限基函数优化设计

发布时间：2018-01-08 12:01

本文关键词：变换域通信系统双门限基函数优化设计　出处：《系统工程与电子技术》2017年03期 　论文类型：期刊论文

【摘要】：针对传统变换域通信系统的基函数门限设计单一固定,且未考虑系统吞吐量的缺点,提出了一种新型的双门限基函数优化设计方法。该方法通过高、低门限的合理设定,确立基函数幅度谱与干扰幅度谱的动态关系式。定义变量PCR(probability of bit error to output capacity ratio)为系统误码率与吞吐量的比值,来综合度量通信系统性能。通过理论分析推导出PCR关于门限的表达式,进而建立优化模型,并采用遍历法进行最终优化搜索。经仿真测试,与传统的二进制门限设计相比,本文所设计双门限优化算法在误码率与系统吞吐量性能上都有较大提升,并能够实现变换域通信系统误码率与吞吐量的最佳权衡。
[Abstract]:In view of the shortcomings of the traditional transform domain communication system that the threshold design of the basis function is single and fixed, and the throughput of the system is not considered, a new method of optimizing the design of the double threshold basis function is proposed. Reasonable setting of low threshold. Establish the dynamic relation between the spectrum of amplitude of basis function and the spectrum of interference amplitude. Define the variable PCR (. Probability of bit error to output capacity ratio is the ratio of bit error rate to throughput. Through theoretical analysis, the expression of threshold of PCR is deduced, then the optimization model is established, and the traversal method is used to carry out the final optimization search. Compared with the traditional binary threshold design, the binary threshold optimization algorithm designed in this paper has a great improvement in bit error rate and system throughput performance. And the best trade-off between bit error rate and throughput can be realized in the transform domain communication system.
【作者单位】：空军工程大学信息与导航学院;空军工程大学空管领航学院;中国人民解放军93057部队;
【基金】：国家自然科学基金(61271250,61571460)资助课题
【分类号】：TN914
【正文快照】： 0引言变换域通信系统(transform domain communicationsystem,TDCS)是基于频谱感知技术及扩频技术发展起来的一种新兴抗干扰通信技术。TDCS能实现认知无线电(cognitive radio,CR)的智能频谱接入需求,因而成为CR具体实现的一个重要方向[1]。与传统接收端进行抗干扰设计不同,TDC

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