This new DARPA chip could give U.S. a leg up in electronic warfare

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In eastern Ukraine, government forces have to face an array of conventional threats. Snipers, artillery and machine gun fire to name a few. On top of that, Ukrainian troops also have to contend with electronic warfare. The separatists, well-supplied and trained by Russia, have the ability to jam drones and communications — seriously hindering battlefield operations for their opponent.

What is happening in Ukraine has major implications for the future of U.S. warfare. Russia and China, both seen as “near-peer” adversaries, have robust electronic warfare capabilities. And while the U.S. is trying to expand its electronic warfare suite, it has been slow going because of budget restrictions and a shrinking military.

Enter a new chip from the Defense Advanced Research Projects Agency that would give the U.S. military a much needed boost when it comes to operating in a combat environment where communications and radar can be jammed by the enemy. This chip — an “exceptionally high-speed analog-to-digital converter,” known as an ADC — would benefit U.S. equipment that operates on the electromagnetic spectrum (radios, radar, etc) by increasing the ability to process portions of the electromagnetic spectrum at a drastically higher rate than current jamming and anti-jamming equipment.

From DARPA’s release on the chip:

Today’s ADCs, however, only process data within a limited portion of the spectrum at a given time. As a result, they can temporarily overlook critical information about radar, jamming, communications, and other potentially problematic EM signals. DARPA’s Arrays at Commercial Timescales (ACT) program addressed this challenge by supporting the development of an ADC with a processing speed nearly ten times that of commercially available, state-of-the-art alternatives. By leveraging this increased speed, the resulting ADC can analyze data from across a much wider spectrum range, allowing DoD systems to better operate in congested spectrum bands and to more rapidly react to spectrum-based threats.

According to DARPA, the only issue with the chip is the amount of power and processing speed required for it to operate. To rectify the issue, DARPA is working with the company GlobalFoundries to create a smaller processor that uses less power but is still able to compute the data required for the chip to work.

This new DARPA chip could give U.S. a leg up in electronic warfare - The Washington Post

 

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New Chips Ease Operations In Electromagnetic Environs


Competition for scarce electromagnetic (EM) spectrum is increasing, driven by a growing military and civilian demand for connected devices. As the spectrum becomes more congested, the Department of Defense (DoD) will need better tools for managing the EM environment and for avoiding interference from competing signals. One recent DARPA-funded advance, an exceptionally high-speed analog-to-digital converter (ADC), represents a major step forward. The ADC could help ensure the uninterrupted operation of spectrum-dependent military capabilities, including communications and radar, in contested EM environments. The advance was enabled by 32 nm silicon-on-insulator (SOI) semiconductor technologies available through DARPA’s ongoing partnership with GlobalFoundries, a manufacturer of highly-advanced semiconductor chips.

The EM spectrum, whose component energy waves include trillionth-of-a-meter-wavelength gamma rays to multi-kilometer-wavelength radio waves, is an inherently physical phenomenon. ADCs convert physical data—that is, analog data—on the spectrum into numbers that a digital computer can analyze and manipulate, an important capability for understanding and adapting to dynamic EM environments.

Today’s ADCs, however, only process data within a limited portion of the spectrum at a given time. As a result, they can temporarily overlook critical information about radar, jamming, communications, and other potentially problematic EM signals. DARPA’s Arrays at Commercial Timescales (ACT) program addressed this challenge by supporting the development of an ADC with a processing speed nearly ten times that of commercially available, state-of-the-art alternatives. By leveraging this increased speed, the resulting ADC can analyze data from across a much wider spectrum range, allowing DoD systems to better operate in congested spectrum bands and to more rapidly react to spectrum-based threats.

How fast is fast? The new ADC samples and digitizes spectrum signals at a rate of over 60 billion times per second (60 GigaSamples/sec). That’s fast enough to directly detect and analyze any signal at 30 GHz or below—a range that encompasses the vast majority of operating frequencies of interest. Whereas scanning through these frequencies today requires costly application-specific hardware with long development cycles, the new ADC can provide a “one-stop shop” for processing radar, communications and electronic warfare signals.

Desirable as these blazing sampling speeds are, they also pose challenges. The amount of data generated is staggering, reaching nearly a terabyte per second. This high data rate requires on-chip data-management circuitry that allows signals to be processed locally on the ADC, reducing the amount of data that must be communicated to neighboring electronics. This on-board digital signal processing burns quite a bit of power and also demands state-of-the-art transistors. The 32 nm SOI technology offered by Global Foundries, the only certified DoD supplier of this circuit technology, provided ACT with the leading-edge transistors needed to sample and process the RF spectrum without exceeding power or data-transfer limitations.

Upcoming ACT designs will go further. By using GlobalFoundries’ even more advanced 14 nm technology, ACT’s next generation of ADCs aim to reduce power requirements by an additional 50 percent and enable yet smaller and lighter systems that can sample even greater swaths of the spectrum.

These ongoing improvements in semiconductor-based components highlight the benefit of DARPA’s longstanding commercial partnerships with players who have mastered the upper limits of modern transistor technology, said Troy Olsson, manager of the ACT programs. “Our performers combined innovative designs with advanced fabrication facilities and techniques to create world-class technology,” Olsson said. “And we are already seeing exciting results that closely match our design expectations.”

DARPA Advance Breaks New Ground for Operating In Congested Electromagnetic Spectrum