Spectrally-compliant waveforms for wideband radar

Nunn, C.; Moyer, Lee R.

doi:10.1109/maes.2012.6329156

Cited by 67 publications

(25 citation statements)

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“…The reason is that that increase in range sidelobes that usually accompanies the inclusion of spectral gaps is to some degree offset by the fact that the sidelobes do not coherently combine within the changing signal structure. A fundamental difference between this approach and existing gapped spectrum approaches [7][8][9][10][11][12][13][14], is that this waveform does not repeat. In this paper the spectrally gapped PRO-FMCW waveform is examined with regards to shaping of the gaps to further reduce range sidelobes and this approach is experimentally measured to evaluate feasible gap depth in the presence of transmitter distortion.…”

Section: Introductionmentioning

confidence: 99%

Gapped spectrum shaping for tandem-hopped radar/communications & cognitive sensing

Jakabosky

Ravenscroft

Blunt

et al. 2016

2016 IEEE Radar Conference (RadarConf)

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A non-repeating FMCW waveform was recently developed and experimentally demonstrated to provide a feasible instantiation of FM noise radar. This emission scheme was subsequently examined in terms of the impact of both stationary and hopped spectral gaps with the prospect of enabling in-band interference avoidance for cognitive sensing and possibly tandem hopped radar/communications. Here this gap-hopped spectrum framework is further explored with regard to the relation between the shaping of spectral gaps and the associated time sidelobe response. Experimental loopback measurements are shown that provide a sense of how this form of emission would operate on a real system.

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Section: Introductionmentioning

confidence: 99%

Gapped spectrum shaping for tandem-hopped radar/communications & cognitive sensing

Jakabosky

Ravenscroft

Blunt

et al. 2016

2016 IEEE Radar Conference (RadarConf)

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“…e −j2π (N −1)p N ] ∈ C N and I M is an M × M identity matrix. 1 Note that we assume that N is even in this paper without loss of generality.…”

Section: A Far-field Beampatternmentioning

confidence: 99%

“…The initial problem CP(1) , the initial feasible set is the blue line. Solution of problem CP(1) lies on the initial feasible set.…”

mentioning

confidence: 99%

Spatio-Spectral Radar Beampattern Design for Coexistence With Wireless Communication Systems

Kang

Aldayel

Monga

et al. 2019

IEEE Trans. Aerosp. Electron. Syst.

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We address the problem of designing a transmit beampattern for multiple-input multiple-output (MIMO) radar considering co-existence with wireless communication systems. The designed beampattern is able to manage the transmit energy in spatial directions as well as in spectral frequency bands of interest by minimizing the deviation of the designed beampattern versus a desired one under a spectral constraint as well as the constant modulus constraint. While unconstrained beampattern design is straightforward, a key open challenge is jointly enforcing the spectral constraint in addition to the constant modulus constraint on the radar waveform. A new approach is proposed in our work, which involves solving a sequence of constrained quadratic programs such that constant modulus is achieved at convergence. Further, we show that each problem in the sequence has a closed form solution leading to analytical tractability. We evaluate the proposed beampattern with interference control (BIC) algorithm against the state-ofthe-art MIMO beampattern design techniques and show that BIC achieves closeness to an idealized beampattern along with desired spectral shaping.

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“…Thus, the design of advanced radar signals ensuring compatibility with the surrounding electromagnetic radiators is of primary concern, namely, by inducing acceptable interference levels on frequency-overlaid systems. Many papers in open literature have considered radar waveform design with a suitable frequency allocation [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] (see also [1] for a concise treatment of their relevant characteristics). In [1], the authors propose radar waveforms that share desirable spectral features, ensure coexistence with overlaid wireless networks, and optimize radar detection performance.…”

Section: Introductionmentioning

confidence: 99%

A new radar waveform design algorithm with improved feasibility for spectral coexistence

Aubry

Maio

Huang

et al. 2015

IEEE Trans. Aerosp. Electron. Syst.

216

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Radar signal design in a spectrally crowded environment is currently a challenge due to the increasing requests for spectrum from both military sensing applications and civilian wireless services. The goal of this paper is to improve a previously devised algorithm for the synthesis of optimized radar waveforms fulfilling spectral compatibility with overlaid licensed radiators. The new technique achieves an enhanced spectral coexistence with the surrounding electromagnetic environment through a suitable modulation of the transmitted waveform energy, which was kept fixed at the maximum level in the previously devised algorithm. At the analysis stage, the waveform performance is studied in terms of trade-off among the achievable Signal to Interference Plus Noise Ratio (SINR), spectral shape, and the resulting Autocorrelation Function (ACF), also in situations where the previous technique cannot be applied.

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Spectrally-compliant waveforms for wideband radar

Cited by 67 publications

References 0 publications

Gapped spectrum shaping for tandem-hopped radar/communications & cognitive sensing

Gapped spectrum shaping for tandem-hopped radar/communications & cognitive sensing

Spatio-Spectral Radar Beampattern Design for Coexistence With Wireless Communication Systems

A new radar waveform design algorithm with improved feasibility for spectral coexistence

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