Direction-of-arrival estimation of broadband microwave signals in phased-array antennas using photonic techniques

Vidal, B.; Piqueras, M.A.; Martí, J.

doi:10.1109/jlt.2006.875945

Cited by 44 publications

(12 citation statements)

References 13 publications

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“…A host of photonic approaches have been proposed and experimentally demonstrated . In , a simple approach using a two‐tap transversal photonic microwave filter was proposed to measure the AOA. The two taps of the filter are realized by using two MZMs with a time delay between the two taps.…”

Section: Photonic Measurement Of Angle‐of‐arrivalmentioning

confidence: 99%

Photonics for microwave measurements

Zou

Lü

Pan

et al. 2016

Laser & Photonics Reviews

293

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As an emerging topic, photonic-assisted microwave measurements with distinct features such as wide frequency coverage, large instantaneous bandwidth, low frequencydependent loss, and immunity to electromagnetic interference, have been extensively studied recently. In this article, we provide a comprehensive overview of the latest advances in photonic microwave measurements, including microwave spectrum analysis, instantaneous frequency measurement, microwave channelization, Doppler frequency-shift measurement, angle-of-arrival detection, time-frequency analysis, compressive sensing, and phase-noise measurement. A photonic microwave radar, as a functional measurement system, is also reviewed. The performance of the photonic measurement solutions is evaluated and compared with the electronic solutions. Future prospects using photonic integrated circuits and software-defined architectures to further improve the measurement performance are also discussed.

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Section: Photonic Measurement Of Angle‐of‐arrivalmentioning

confidence: 99%

Photonics for microwave measurements

Zou

Lü

Pan

et al. 2016

Laser & Photonics Reviews

293

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show abstract

“…In addition, its immunity to electromagnetic interference makes photonics a solution particularly suitable for defense applications. In the field of microwave measurement, a number of photonic approaches for frequency estimation [7][8][9][10][11][12][13][14][15] and spectrum analysis [16][17][18] have been proposed, but few approaches deal with the measurement of critical parameters such as the AOA [19,20] and the time-difference-ofarrival (TDOA).…”

mentioning

confidence: 99%

Photonic approach to the measurement of time-difference-of-arrival and angle-of-arrival of a microwave signal

Zou

Pan

et al. 2012

Opt. Lett.

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We propose and experimentally demonstrate a photonic approach to the measurement of the time-difference-of-arrival (TDOA) and the angle-of-arrival (AOA) of a microwave signal. In the proposed system, the TDOA and the AOA are equivalently converted into a phase shift between two replicas of a microwave signal received at two cascaded modulators. The light wave from a CW laser is externally modulated by the microwave signal at the first modulator, which is biased to suppress the optical carrier, leading to the generation of two first-order sidebands, which are further modulated by the phase-delayed microwave signal at the second modulator. Two optical components at the carrier wavelength are generated. The total power at the carrier wavelength is a function of the phase shift due to the coherent interference between the two components. Thus, by measuring the optical power, the phase shift is estimated. The AOA is calculated from the measured phase shifts. In our experiment, the phase shift of a microwave signal at 18 GHz from -160° to 40° is measured with measurement errors of less than ±2.5°.

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“…12 Another technique for detecting the DOA of broadband MW signals in phased-array antennas is based upon a two-tap photonic transversal MW filter and measuring the frequency of the notches produced over the broadband signal using a spectrum analyzer. 13 Recently, a broadband, multiemitter DF system using a dual-drive MZM and a spatial-spectral material-based spectrum analyzer was presented that provides fine angular and spectral resolutions for spectrally nonoverlapping signals. 14 In this paper, a photonic wideband four-element phase sampling linear DF antenna array using a robust symmetrical number system (RSNS) preprocessing technique is presented that is characterized by a high angular (spatial) resolution, a wide frequency BW, a wide field-of-view (FOV), a minimum number of array elements, and a short array baseline length.…”

Section: Introductionmentioning

confidence: 99%

Wideband direction finding using a photonic robust symmetrical number system technique

et al. 2014

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Abstract. Dual electrode Mach-Zehnder modulators (DE-MZMs) are used to conduct phase detection for direct wideband direction finding (DF) of microwave signals. It is demonstrated theoretically and through simulation and experimentation that the normalized magnitude of the output signal phase detector circuit is equal to j sinðψ∕2Þj, where ψ is the phase difference between the plane waves arriving at the reference and measurement antennas of a linear DF array. A four-element wideband photonic DF system with robust symmetrical number system preprocessing is presented. Simulation and experimental testing results are provided to demonstrate the theoretical concept. The results demonstrate a direct DF receiver using DE-MZMs that achieves fine angular resolution using a much smaller array size than is typically required for linear arrays employing super-resolution signal processing techniques.

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Direction-of-arrival estimation of broadband microwave signals in phased-array antennas using photonic techniques

Cited by 44 publications

References 13 publications

Photonics for microwave measurements

Photonics for microwave measurements

Photonic approach to the measurement of time-difference-of-arrival and angle-of-arrival of a microwave signal

Wideband direction finding using a photonic robust symmetrical number system technique

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