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以TI(Texas Instruments)公司的TMS320C6416T为核心,设计了一个广播式自动相关监视(Automatic de-pendent surveillance broadcast,ADS-B)系统的地面接收机。该接收机的射频模块对ADS-B信号进行直接射频检波得到视频信号,基带模块对该视频信号进行解析提取出飞机的状态信息,并通过网口上传报文,在个人计算机(Personal computer,PC)机上进行航迹显示。提出了基于置信度判定的强力纠错算法,改进了压缩位置报告(Com-pact position reporting,CPR)技术中的解码算法,并在DSP(Digital signal processing)上实现。外场测试结果表明,该接收机可对370km范围内空域的飞机进行监视,满足ADS-B系统的要求,适用于下一代民航空管监视系统。
Based on Texas Instruments TMS320C6416T, a terrestrial receiver based on ADS-B system is designed. The RF module of the receiver performs direct radio frequency detection on the ADS-B signal to obtain a video signal, and the baseband module analyzes the video signal to extract the status information of the aircraft and uploads the message through a network port, and sends the message to a PC ) On the flight path display. This paper proposes a robust error correction algorithm based on confidence decision, improves the decoding algorithm in Com-pact position reporting (CPR) and implements it in DSP (Digital signal processing). The field test results show that the receiver can monitor the aircraft in the airspace within 370km to meet the requirements of the ADS-B system and is suitable for the next generation of civil aviation ATC system.