ADS-B接收机S模式关键算法研究及实现  

Study and Realization on Mode S Key Algorithms of ADS-B Receiver

作　　者：刘晓斌[1] 何春[1] 张超[1] 朱姝[1] 

机构地区：[1]电子科技大学电子科学技术研究院,成都610054

出　　处：《现代雷达》2011年第7期36-39,共4页Modern Radar

基　　金：航空科学基金资助项目(20090580013)

摘　　要：分析了广播式自动相关监视(ADS-B)模式S接收机的数字信号处理算法,着重阐述了基于参考功率进行位和置信度检测、判定算法的原理。根据接收机的性能参数,提出了一种基于时域处理的置信度算法。该算法主要是利用通过对数字信号的功率幅度值进行对比,然后用一定规则分析对比结果,最终得到数据位的比特位和置信度的高低。文中还给出了置信度算法的可编程门阵列(FPGA)实现方案,采用Verilog HDL语言完成了其功能模块的设计,并进行了电路仿真、实验。实验结果表明,该算法设计合理,能够快速准确地实现ADS-B系统报头的比特位和置信度的检测及提取。This paper analyzes the composition of ADS-B（Automatic Dependent Surveillance-Broadcast） based on Mode S receiver and signal processing algorithm,and especially focuses on detection and decision algorithm of bit and degree of confidence based on reference power,proposed confidence degree algorithm of time-domain processing according to the performance parameters of receiver.The algorithm is mainly used by the power of digital signal amplitude comparison,then analyzing and comparing the results with certain rules,and finally getting the bits and the level of confidence of datas.After that,FPGA proprietary implementation of confidence degree algorithm can be present.Under excogitation of all function modules using verilog HDL ianguage circuit simulation results can show that this proprietary implementation is reasonable and goes well on extraction of bit header and bit confidence degree.

关 键 词：ADS-B 模式S 参考功率 比特位 置信度 

分 类 号：TN851[电子电信—信息与通信工程]