模式S应答处理中的数据处理

【作者】 陈士毅；

【导师】 李玉柏；

【作者基本信息】 电子科技大学 ， 信号与信息处理， 2006， 硕士

【摘要】 模式S是下一代地基雷达监视系统,除去传统二次监视雷达(SSR)的A/C模式功能外,模式S同时提供增强的监视能力和完全的地空数据链交互能力。模式S系统在国外已得到广泛应用,但是在国内,关于模式S的研究才刚刚起步。本论文以模式S扩展应答信号的接收处理为主要研究对象,在深入分析模式S系统原理的基础上,以应答处理中的数据处理为重点,阐述了用FPGA+DSP的构架实现模式S扩展应答信号接收处理的算法和硬件实现,并给出了主要模块的仿真结果。主要内容为:1.详细研究了模式S扩展应答信号的增强接收技术,包括报头检测、重触发和数据处理等。2.详细研究了使用AMP信号和OBA信号进行联合判定的技术。3.详细研究了基于比特置信度判定的循环冗余校验纠错技术。4.基于FPGA+DSP构架的模式S应答处理的硬件设计。其中,FPGA完成模式S报头的初检和应答帧数据组织,DSP完成模式S应答帧的进一步鉴别和数据处理。5.初步研究了模式S数据链路。更多还原

【Abstract】 Mode S is the next generation SSR (Secondary Surveillance Radar) system. Mode S provides enchanced surveillance and complete air-ground data link capability, as well as A/C mode function of traditional SSR. Mode S system is widely used abroad, but the study on Mode S has just started internally.In this thesis, the data process of Mode S Extended reply is the main research object. The basic principle of Mode S system has been analyzed. Then the algorithm of Mode S Extended reply Enhanced Reception Techniques is analyzed, the hardware realization based on FPGA and DSP is expounded, simulation results of the main module is given. The main contents are as follows:1. Mode S Extended Squitter Enhanced Reception Techniques, including preamble detection, re-triggering and data process, are investigated in detail.2. Bit and confidence declaration using both AMP and OBA signal from radar.3. Error correcting cyclic redundancy checks based on confidence declaration is studied in detail.4. The implementation of Mode S algorithm in hardware architecture of FPGA and DSP.5. Mode S data link has been studied preliminarily.更多还原