Results 31 to 40 of about 993 (170)
Bounds on the growth rate of the peak sidelobe level of binary sequences
Advances in Mathematics of Communications, 2007 The peak sidelobe level (PSL) of a binary sequence is the largest absolute value of all its nontrivial aperiodic autocorrelations. A classical prob- lem of digital sequence design is to determine how slowly the PSL of a length n binary sequence can grow, as n becomes large.
Denis Dmitriev, Jonathan Jedwab
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Range sidelobe suppression for OFDM-integrated radar and communication signal
The Journal of Engineering, 2019 To improve the RadCom system of performing both data transmission and radar-sensing functions, here a waveform design method for orthogonal frequency division multiplexing (OFDM) signal is proposed to solve the problem of high range sidelobe level in ...
Jiajun Zuo +3 more
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Doppler Shift Tolerance of Typical Pseudorandom Binary Sequences in PMCW Radar
Sensors, 2022 In the context of all-digital radar systems, phase-modulated continuous wave (PMCW) based on pseudorandom binary sequences (PRBSs) appears to be a prominent candidate modulation scheme for applications such as autonomous driving.
Lucas Giroto de Oliveira +9 more
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Sidelobe Suppression with Resolution Maintenance for SAR Images via Sparse Representation
Sensors, 2018 Severe sidelobe interference is one of the major problems with traditional Synthetic Aperture Radar (SAR) imaging. In the observation scene of sea areas, the number of targets in the observation scene is so small that targets can be regarded as sparse ...
Xiaoxiang Zhu +4 more
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ICT ExpressOFDM-based cognitive radio networks suffer from high sidelobe emissions, leading to adjacent interference and potential security vulnerabilities. This paper introduces a Whale Optimization Algorithm (WOA)-based cancellation carrier (CC) approach for ...
Atif Elahi +4 more
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Analysis of Non Linear Frequency Modulation (NLFM) Waveforms for Pulse Compression Radar
Jurnal Elektronika dan Telekomunikasi, 2018 Non Linear Frequency Modulation (NLFM) method can suppress the peak sidelobe level without additional windowing function. NLFM doesn’t require any weighting function because it has inbuilt one.
Muhamad Ridwan Widyantara +4 more
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Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
Improved bounds on the peak sidelobe level of binary sequences
CoRR, 2015 Schmidt proved in 2014 that if $\varepsilon>0$, almost all binary sequences of length $n$ have peak sidelobe level between $(\sqrt{2}-\varepsilon)\sqrt{n\log n}$ and $(\sqrt{2}+\varepsilon)\sqrt{n\log n}$. Because of the small gap between his upper and lower bounds, it is difficult to find improved upper bounds that hold for almost all binary ...
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Advanced Intelligent Systems, EarlyView.A piezoelectric meta‐transducer generates an ultrasonic rainbow, steering guided elastic waves to different angles according to frequency. A dithering‐based binary electrode design enables a closer realization of the target wavenumber filter, improving directional purity and suppressing unwanted lobes. Numerical and experimental validation demonstrates
Masoud Mohammadgholiha +5 more
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International Journal of Antennas and Propagation, 2015 We discuss the importance of using the sidelobe level of the cross-correlation function as a criterion to implement a noise radar based on the transmission of wideband binary waveforms.
Ana Vazquez Alejos +2 more
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