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 interference; radar signal processing; WiMax; electromagnetic compatibility; diversity reception

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

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