据mil-embedded网2020年1月26日报道，DARPA推进“宽带自适应射频保护”（WARP）计划，旨在开发宽带、自适应滤波器和模拟信号抵消器，有针对性地消除外部产生的干扰信号，以加强拥挤和竞争电池环境中的宽带接收机保护。 WARP将通过开发自适应模拟信号消除器，降低宽带数字接收机的发射泄漏，解决自适应推理问题。

DARPA’s WARP program to protect wideband RF systems

WASHINGTON. The Defense Advanced Research Projects Agency’s (DARPA) introduced its Wideband Adaptive RF Protection (WARP) program, which seeks to enhance protections for wideband receivers operating in congested and contested electromagnetic (EM) environments.

The goal is to develop wideband, adaptive filters and analog signal cancellers that selectively cancel externally generated interference signals, like adversarial jamming, and self-generated interference signals (like those created by a radio’s own transmitter) to protect wideband digital radios from saturation.

To address external interference, WARP will explore wideband tunable filters that can sense the EM environment and adapt to maintain the receiver’s dynamic range without decreasing signal sensitivity or bandwidth. The research will look at filter architectures and packaging to achieve the program’s target metrics.

WARP will also address self-generated inference with the development of adaptive, analog signal cancellers intended to reduce the transmit leakage before the wideband digital receiver.