Electromagnetic Compatibility and Spectrally Cleaner Waveforms

Electromagnetic Compatibility and Spectrally Cleaner Waveforms

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Radar technology has a number of self-competing interests. For example, a radar must be able to search and track targets by resolving their spatial locations in range and azimuth. Transmitted short-duration pulses, with associated desirable broad bandwidths, allow radars to achieve the high range resolutions necessary to resolve multiple targets in space. However, temporally short pulses and their corresponding fast rise and fall times generate spectral sidelobes that may induce EMI in wireless systems, like WiMAX residing in the 3.4-3.7 GHz band, and other radars in adjacent channels. Waveform diversity techniques and designs, like the NRL Chireix concept, may allow radar performance metrics to be met while permitting conformance to regulatory emission masks like those found in the RSEC. The hypercube concept, while posing many formidable challenges in terms of hardware, signal processing, and networking, may potentially allow future users of the electromagnetic spectrum to coexist without compromising individual performances.

Inspec keywords: electromagnetic compatibility; WiMax; radar signal processing; diversity reception; electromagnetic interference

Other keywords: track targets; NRL Chireix concept; hypercube concept; networking; electromagnetic compatibility; spectrally cleaner waveforms; broad bandwidths; wireless systems; waveform diversity techniques; spatial locations; transmitted short-duration pulses; RSEC; radar technology; electromagnetic spectrum; individual performances; EMI; search targets; signal processing; WiMAX

Subjects: Electromagnetic compatibility and interference; Radar equipment, systems and applications; Signal processing and detection

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