Time Difference of Arrival (TDOA)

Time Difference of Arrival (TDOA) is a technique for geo-locating RF sources. It requires three or more remote receivers (probes) capable of detecting the signal of interest. Each probe is synchronized in time to capture corresponding I/Q data blocks. Software shifts the time signature of each I/Q data set to find the difference in the arrival time at each probe.

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Design Secrets Behind the World’s First K-band DAC

This paper covers design choices of the world’s first K-band data converter. By avoiding established CMOS design principles and applying an ultra-high speed process, new capabilities emerged; a compact, single-core quantizer and design expertise led to breakthrough performance and layout and circuit simplifications are dominant design considerations.

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Radar Cross Section of Aircraft with Engine Inlets

At radar frequencies, 1GHz and above, asymptotic methods are usually preferred to calculate the radar cross section (RCS) of targets like aircraft, since the main parts of the target are more than an order of magnitude larger than the wavelength. The challenge is how to combine these methods to compute the RCS. In this white paper the two-step method that obtains accurate results in limited time is detailed.

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