软件无线电侦察中数字通信信号位同步的实现

简单勾画出从软件无线电到软件无线电侦察的发展脉络，以此作为论文工作的应用背景；并在对常规数字通信中位同步技术进行回顾的基础上，阐明了软件无线电侦察中数字通信信号的位同步问题的特殊性。之后论文给出了全部工作所要基于的一个软件无线电侦察硬件实验平台，重点提出并论述了一种解决软件无线电侦察中数字通信信号位同步问题的思路，包括位同步处理及解调的基本流程图及关键点的信号波形示意图。最后是对该位同步方法的性能进行了定量的数学分析。相继推导得出用以描述位同步相位误差、捕获概率、捕获时间、位同步保持时间和位同步带宽等性能指标的数学表达式。

Realization of Bit Synchronization for Digital Communication Signal in Software Radio Reconnaissance

The evolution process of software radio reconnaissance is briefly delineated first as the application background of this paper.Based on the review of bit synchronization technique(BST) for the conventional digital communication the particularities of its counterpart for software radio reconnaissance(SRR) are clarified.Next,an experimental hardware platform for SRR was illustrated,on which the complete work of this paper was concentrated,and then the paper focused on the suggestion and discussion of an approach to the problem of BST for digital communication signal in SRR.In addition,the skeletal flowchart of bit synchronization and demodulation was demonstrated with the schematic waveforms of its key points.The final part of this paper was devoted to the quantitatively mathematical analysis of the above BST's performance.Mathematical formulas for performance indices were derived successively,such as phase error,capture probability,capture time,holding time and bandwidth of bit synchronization.