据《简式防务》4月19日报道

美国国防部国防高级研究计划局（DARPA）已正式选定几个研究小组，旨在牵头开展技术研发，以扩展和提升美军宽带软件定义无线电能力。这些小组来自工业界和学术界，将在宽带射频消除干扰领域探索研究一系列技术途径，为目前和未来软件定义无线电平台服务，这也是“宽带自适应射频防护（WARP）”计划的重要内容。宽带软件定义无线电系统可提供前所未有的射频频谱介入，并因此而在军民领域推广应用。但是，随着带宽增加，动态范围逐步减小，直接影响无线电系统的灵敏度和性能。研究团队将围绕电磁阀谐振器技术，以及多铁性、声学、光子材料进行规划和实验，以提升无线电系统射频滤波器和信号消除能力。

DARPA selects research teams for WARP programme

by Carlo Munoz 19 APRIL 2021，JANES

The US Defense Advanced Research Projects Agency (DARPA) have officially selected several research teams to lead the agency’s work in developing technologies to expand and enhance wideband software defined radio (SDR) capabilities across the US armed forces.

The teams, consisting of participants from industry and academia, “will explore a diverse set of technology approaches” in the field of wideband radio frequency (RF) interference cancellation for current and future SDR platforms, as part of the Wideband Adaptive RF Protection (WARP) programme, agency officials said in a statement.

“Wideband software-defined radio systems provide unprecedented access to the RF spectrum and are beginning to proliferate throughout the [US Department of Defense – DoD] and commercial applications as a result. Unfortunately, as bandwidth increases, dynamic range tends to decrease, which impacts the radio’s sensitivity and performance,” DARPA officials said.

A US Army radio operator-maintainer works on a AN/PRC 1510, high-frequency radio at Fort Gordon, Georgia. (US Army )

In an effort to reduce that dynamic range reduction, while maintaining expanded wideband capability for SDR’s, WARP programme officials are exploring advanced in the use of tuneable filters and signal cancellers “to manage external interference as well as … to address self-interference”, in those radio platforms, agency officials explained.

Specifically, the WARP research teams will plan and execute experimental work on intrinsically switched electromagnetic (EM) resonator technologies, as well as multiferroics, acoustics, and photonics to enable tuneable RF frequency filter and signal cancelling capabilities for SDR systems. Those technologies would be paired “with new circuit architectures, heterogeneous device integration, and advanced RF packaging”, which would provide SDR operators adaptive control of those RF tuning and signal cancelling capabilities, according to DARPA.

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