The detection and tracking performance of passive radar systems can be enhanced by exploiting multiple emitters and one receiver site by allowing for multiple bistatic geometries. This article investigates the measurement accuracy of passive radar systems that employ the advanced television system committee (ATSC 1.0) signal as a signal of opportunity. The monostatic and bistatic modified Cramér–Rao lower bound for the range and velocity measurements are derived as a quantitative way to evaluate the performance variation when exploiting multiple transmitters. The effect of 3D target position on the signal-to-noise ratio, with respect to stationary transmitters and receiver, is highlighted. Furthermore, signal-to-interference-and-noise ratio modeling is included by considering the direct signal interference suppression performance for a set of transmitters. An example in Columbus, Ohio, for a single receiver and multiple digital television transmitters that are spatially distributed is presented to find the optimal emitter that yields the best range and velocity measurement in the analyzed area. Target-tracking experiments show an agreement between the optimal emitter map and the tracking quality for the set of transmitters.

中文翻译：

---

ATSC 基于信号的无源雷达系统的测量精度评估

通过允许多个双基地几何结构，利用多个发射器和一个接收器站点，可以增强无源雷达系统的检测和跟踪性能。本文研究了采用高级电视系统委员会 (ATSC 1.0) 信号作为机会信号的无源雷达系统的测量精度。距离和速度测量的单基地和双基地修正 Cramér-Rao 下限是作为一种定量方法来评估使用多个发射机时的性能变化的。突出显示了 3D 目标位置对固定发射器和接收器的信噪比的影响。此外，通过考虑一组发射机的直接信号干扰抑制性能，包括信干噪比建模。以俄亥俄州哥伦布市为例，展示了单个接收器和多个空间分布的数字电视发射器的示例，以找到在分析区域内产生最佳距离和速度测量的最佳发射器。目标跟踪实验表明，最佳发射器地图与发射器集的跟踪质量之间存在一致性。