Notched spectrum: from probing waveforms to receive filters

Yi Jiang; Christopher D. Gianelli

doi:10.1117/12.2016079

23 May 2013 Notched spectrum: from probing waveforms to receive filters

Yi Jiang, Christopher D. Gianelli

Author Affiliations +

Proceedings Volume 8746, Algorithms for Synthetic Aperture Radar Imagery XX; 874604 (2013) https://doi.org/10.1117/12.2016079
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

The increasing demand for wireless data services and communications is expanding the frequency footprint of both civilian and military wireless networks, and hence encroaches upon spectrum traditionally reserved for radar systems. To maximize spectral efficiency, it is desirable for a modern radar system to use waveforms with the ability to fit into tightly controlled spectral regions, which requires the formation of nulls with required notching levels on prescribed frequency stop-bands. Additionally, the waveform should posses a low peak-to-average ratio (PAR), and have good auto-correlation performance. In this work, we propose a novel method for the design of such a waveform using alternating convex optimization. The core module of the proposed algorithm is a fast Fourier transform, which makes the algorithm quite efficient and can handle waveform designs with up to 10⁵ samples. Moreover, our algorithm can achieve a flexible tradeoff between PAR and reduced pass band ripple. A simple application in synthetic aperture radar is considered to highlight the performance of the design algorithm.

Citation Download Citation

Yi Jiang and Christopher D. Gianelli "Notched spectrum: from probing waveforms to receive filters", Proc. SPIE 8746, Algorithms for Synthetic Aperture Radar Imagery XX, 874604 (23 May 2013); https://doi.org/10.1117/12.2016079

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KEYWORDS

Synthetic aperture radar

Convex optimization

Radar

Image quality

Data communications

Optical filters

Telecommunications

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