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sidelobe reduction

Sidelobe reduction for plane wave compounding with a limited frame number

Sidelobe reduction for plane wave compounding with a limited frame number

... the sidelobe when the compounding frames are sufficient ...a sidelobe reduction beamformer for the PWC based on the singular value decomposition (SVD) filter ...the sidelobe artefacts from ...

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Two-Way Pattern Synthesis of MIMO Radar with Sidelobe Reduction and Null Control via Improved Whale Optimization Algorithm

Two-Way Pattern Synthesis of MIMO Radar with Sidelobe Reduction and Null Control via Improved Whale Optimization Algorithm

... In 2016, [21] proposes WOA inspired by the hunting behavior of humpback whales. The WOA is very competitive, in comparison with several state-of-the-art meta-heuristic algorithms [21]. So far, WOA has been applied in ...

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The Response to Arbitrarily Bandlimited Gaussian Noise of the Complex Stretch Processor Using a Conventional Range Sidelobe Reduction Window

The Response to Arbitrarily Bandlimited Gaussian Noise of the Complex Stretch Processor Using a Conventional Range Sidelobe Reduction Window

... This paper derives a mathematical description of the complex stretch proces- sor’s response to bandlimited Gaussian noise having arbitrary center fre- quency and bandwidth. The description of the complex stretch ...

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Planar Array Synthesis with Sidelobe Reduction and Null Control Using Invasive Weed Optimization

Planar Array Synthesis with Sidelobe Reduction and Null Control Using Invasive Weed Optimization

... Numerical and iterative approaches based on the IWO algorithm for pattern synthesis of planar array with prescribed pattern nulls and sidelobe reduction by optimizing the amplitudes-only and position- only ...

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Some Aspects of Sidelobe Reduction in Pulse Compression Radars Using Nlfm Signal Processing

Some Aspects of Sidelobe Reduction in Pulse Compression Radars Using Nlfm Signal Processing

... the second polynomial predistortioning function was partially tested in literature, but in a particular case (i.e., for polynomial functions with order more than one and the predistortioning applied only to a single LFM ...

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1.
													Sidelobe reduction using frequency modulated pulse compression techniques in radar

1. Sidelobe reduction using frequency modulated pulse compression techniques in radar

... peak sidelobe levels, Non linear Frequency Modulated Pulse Compression techniques are ...peak sidelobe levels compared to the LFM and PLFM despite main lobe ...peak sidelobe level to the greater ...

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Ultra low range sidelobe level pulse compression waveform design for spaceborne meteorological radars.

Ultra low range sidelobe level pulse compression waveform design for spaceborne meteorological radars.

... range sidelobe reduction techniques has been carried ...range sidelobe levels below -60 dB with excellent Doppler tolerance for excessively large time-bandwidth products with associated SNR losses ...

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A Two-Step Method for the Low-Sidelobe Synthesis of Uniform Amplitude Planar Sparse Arrays

A Two-Step Method for the Low-Sidelobe Synthesis of Uniform Amplitude Planar Sparse Arrays

... Suppose that 39 elements need to be filled in a PSA with the aperture size of 3.5λ × 3.5λ, thus the aperture can be divided into 8 × 8 rectangular lattices according to Equation (2). After 50 trials of the IFT-DE, the ...

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Analysis of Sidelobe Level and Beamwidth of Uniform Concentric Circular Arrays Utilizing Kaiser Amplitude Weighting

Analysis of Sidelobe Level and Beamwidth of Uniform Concentric Circular Arrays Utilizing Kaiser Amplitude Weighting

... possible sidelobe level that can be 45 dB below the main lobe level and these optimum weights are found to be function of the number of elements of the innermost ring and the number of rings in the ...

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A stable realization of apodization filtering applied to noise SAR and SAR range sidelobe suppression

A stable realization of apodization filtering applied to noise SAR and SAR range sidelobe suppression

... Figure 7 is an example of matched filtering for three targets that are close to each other in range. Two of these targets have equal radar cross section, whereas the other is a weak target with much lower radar cross ...

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Realization of Logarithmic Spaced Antenna Arrays for the Generation of Low Sidelobe Radiation Patterns

Realization of Logarithmic Spaced Antenna Arrays for the Generation of Low Sidelobe Radiation Patterns

... significant sidelobe reduction if non uniform elevational spacing of antenna elements on the logarithmic is ...achieved sidelobe level reduction with unequally spaced arrays could reach even ...

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PAPR Reduction and Sidelobe Suppression Using DWT and Hadamard Transform in NC-OFDM Based Cognitive Radio Systems

PAPR Reduction and Sidelobe Suppression Using DWT and Hadamard Transform in NC-OFDM Based Cognitive Radio Systems

... PAPR reduction and sidelobe suppression as a quadratic ally constrained quadratic program (QCQP) and the optimal cancelation signal can be obtained by convex ...

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A 8x1 Sprout-Shaped Antenna Array with Low Sidelobe Level of -25 dB

A 8x1 Sprout-Shaped Antenna Array with Low Sidelobe Level of -25 dB

... This paper proposes a 8 × 1 sprout-shaped antenna array with low sidelobe level (SLL) for outdoor point to point applications. The array has the dimensions of 165 mm × 195 mm × 1.575 mm and is designed on Rogers ...

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Comparative Study of Sidelobe Roll Off Ratio for Various Window Functions and its Application

Comparative Study of Sidelobe Roll Off Ratio for Various Window Functions and its Application

... better sidelobe roll-off characteristic than the other well-known adjustable windows such as Dolph- Chebyshev [4] and Saramaki [5], which are special cases of ultraspherical window ...namely sidelobe roll ...

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Two new approaches to spatial interpolation with inherent sidelobe suppression for imaging riometers

Two new approaches to spatial interpolation with inherent sidelobe suppression for imaging riometers

... From left to right: Synthetic skymap used to synthesise power readings for all 49 IRIS beams; original MIA interpolation algorithm applied to the synthetic power readings of all IRIS bea[r] ...

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Wideband and Low Sidelobe Linear Series Fed Yagi-Like Antenna Array

Wideband and Low Sidelobe Linear Series Fed Yagi-Like Antenna Array

... In radar systems parameters such as sidelobe level, SLL, front to back ratio, F/B, [1] and bandwidth, [3], are of high importance. Depending on the radar system SLL in between −20 to −50 dB is usually required ...

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Synthesis of Optimal Narrow Beam Low Sidelobe Linear Array with Constrained Length

Synthesis of Optimal Narrow Beam Low Sidelobe Linear Array with Constrained Length

... 2.1. Problem Formulation and Discrete Approximation One looks for the linear array of given length L (i.e., given distance between the phase center of the first and last element) that yields the pattern with a broadside ...

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Low sidelobe and wideband characteristics of density tapered arrays for 5G mobile systems

Low sidelobe and wideband characteristics of density tapered arrays for 5G mobile systems

... low sidelobe and wide band characteristics are numerically clarified through calculation results of a High Frequency Structure Simulator ...of sidelobe levels and unequally element spacing are ...

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Generation of Low Sidelobe Radiation Patterns with Narrow Beams for the Suppression of EMI in Radar Receivers

Generation of Low Sidelobe Radiation Patterns with Narrow Beams for the Suppression of EMI in Radar Receivers

... R.S.Elliot [5] has described a design method for the creation of line source that results an antenna radiation pattern consisting of a narrow beam with low sidelobes.The resultant sidelobe levels are different on ...

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A frequency sharing weather radar network system using pulse compression and sidelobe suppression

A frequency sharing weather radar network system using pulse compression and sidelobe suppression

... its sidelobe component and gracefully removes ...removes sidelobe components from the MF output, and at the same time, reconstruct (estimate) the impulse response from ...iterative sidelobe removal ...

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