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首页> 外文会议>Radar Sensor Technology XI; Proceedings of SPIE-The International Society for Optical Engineering; vol.6547 >Detection and tracking of humans and vehicle targets using high definition television signals in urban areas
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Detection and tracking of humans and vehicle targets using high definition television signals in urban areas

机译：在城市地区使用高清电视信号检测和跟踪人和车辆目标

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The detection and tracking of humans and vehicles on the battlefield using radar systems operating at microwave frequencies was first achieved almost 40 years ago. The subsequent generation of radars designed to detect personnel and vehicles on the battlefield has seen improvements due to increased signal processing capability. To date, most of the self-contained human detection radars have incorporated a co-located (monostatic) transmitter and receiver operated by humans. Approximately, three decades ago the bistatic radar was introduced and used for security at high value target sites. These bistatic "fence" radars employ a transmitter located at one end of a bistatic baseline and a receiver at the other end of the baseline. The receiver is tuned to the transmitter. Operation is simple; an intruder crosses the bistatic baseline and is detected after simple signal processing is performed on the bistatic signature produced by the intruder. The experiments demonstrate that passive bistatic radar can be used to detect humans and vehicles.rnThis paper describes "quick-look" experiments that have been conducted in the Atlanta, Georgia area to detect humans and vehicles using a passive radar configuration requiring no coordination between the receiver and transmitter. The illumination source (transmitter) is a High Definition Television (HDTV) broadcast transmitter located approximately 13.5 miles from the test area. The transmitter is broadcasting a 6 MHz wide digital signal with a pilot carrier on a frequency of 548.310 MHz. The continuous wave (CW) pilot carrier HDTV signal component is processed to extract the signature of the walking human or the signature of a vehicle. The experimental receiving system utilizes a commercial off-the-shelf (COTS) communications receiver. A set of multi-element back to back Yagi antennas are used to provide a reference signal and the signal from the area where the human subject is located. The walking human generates micro-Doppler that can be detected using micro-Doppler signal processing techniques. Vehicular targets can be detected without applying micro-Doppler processing due to a vehicle's larger radar cross section (RCS) and higher Doppler shift (higher velocity). The technical challenges that are addressed in the following sections include receiver stability, common signal cancellation, multipath environments, and geometries. The technique has also been tested inside of a building and it has been found that walking humans can be detected through walls and down long halls.
机译：使用在微波频率下运行的雷达系统对战场上的人员和车辆进行检测和跟踪大约在40年前就已实现。由于信号处理能力的增强，旨在检测战场上人员和车辆的雷达已得到改进。迄今为止，大多数独立的人体检测雷达都装有由人类操作的同位（单点）发射器和接收器。大约三十年前，引入了双基地雷达并将其用于高价值目标站点的安全。这些双基地“栅栏”雷达采用位于双基地基线一端的发射器和位于基线另一端的接收器。接收器调谐到发射器。操作简单；入侵者越过双基地基线，并在对入侵者产生的双基地信号进行简单的信号处理后被检测到。实验表明，无源双基地雷达可用于探测人和车辆。本文描述了在乔治亚州亚特兰大地区进行的“快速外观”实验，该探测使用不需要雷达之间协调的无源雷达配置来探测人和车辆。接收器和发射器。照明源（发射器）是高清电视（HDTV）广播发射器，距离测试区域约13.5英里。发射机正在以548.310 MHz的频率广播一个6 MHz宽的数字信号，并带有一个导频载波。处理连续波（CW）导频载波HDTV信号分量，以提取行走人员的签名或车辆的签名。实验接收系统利用商用现货（COTS）通信接收器。一组多元素背负八木天线用于提供参考信号和来自人类受试者所在区域的信号。行走的人会产生微​​多普勒，可以使用微多普勒信号处理技术进行检测。由于车辆较大的雷达横截面（RCS）和较高的多普勒频移（较高的速度），因此无需应用微多普勒处理就可以检测到车辆目标。以下各节解决的技术难题包括接收机稳定性，常见信号消除，多径环境和几何形状。该技术还已经在建筑物内部进行了测试，并且发现可以通过墙壁和长长的大厅向下检测到步行的人。

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