Results 31 to 40 of about 9,233 (214)
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
doaj +1 more source
CMB polarimetry with BICEP: instrument characterization, calibration, and performance [PDF]
, 2008 BICEP is a ground-based millimeter-wave bolometric array designed to target the primordial gravity wave signature on the polarization of the cosmic microwave background (CMB) at degree angular scales. Currently in its third year of operation at the South
Ade, P. +24 more
core +4 more sources
Comparing the effect of aperture extension on the peak sidelobe level of sparse arrays [PDF]
The Journal of the Acoustical Society of America, 2017 This paper compares the performance of Uniform Linear Arrays (ULA), Minimum Redundancy Arrays (MRA) and Co-prime Sensor Arrays (CSA) in terms of the Peak Sidelobe Level (PSL) of their beampatterns. A ULA distributes its sensor elements equidistantly on a line, achieving a PSL of -13.5dB [Van Trees, 2002]. Sparse arrays span the equivalent aperture as a
Ferdousi Sabera, Rawnaque, John R, Buck
openaire +2 more sources
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
doaj +1 more source
Angular dependence of 12-kHz seafloor acoustic backscatter [PDF]
, 1991 The angular dependence of seafloor acoustic backscatter,measured with a 12‐kHz multi narrow‐beam echo‐sounder at two sites in the central North Pacific with water depths of 1500 and 3100 m, respectively, has been determined for incidence angles between 0°
Alexandrou, Dimitri +1 more
core +2 more sources
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
doaj +1 more source
Ultrasound array transmitter architecture with high timing resolution using embedded phase-locked loops [PDF]
, 2012 Coarse time quantization of delay profiles within ultrasound array systems can produce undesirable sidelobes in the radiated beam profile. The severity of these sidelobes is dependent upon the magnitude of phase quantization error - the deviation from ...
Cowell, DMJ +4 more
core +1 more source
On Measuring Accurate 21-cm Line Profiles with the Robert C. Byrd Green Bank Telescope
, 2009 We use observational data to show that 21 cm line profiles measured with the Green Bank Telescope (GBT) are subject to significant inaccuracy. These include ~10% errors in the calibrated gain and significant contribution from distant sidelobes.
Heiles, Carl, Robishaw, Timothy
core +1 more source
Phased-MIMO Radar: A Tradeoff Between Phased-Array and MIMO Radars [PDF]
, 2009 We propose a new technique for multiple-input multiple-output (MIMO) radar with colocated antennas which we call phased-MIMO radar. The new technique enjoys the advantages of MIMO radar without sacrificing the main advantage of phased-array radar which ...
Aboulnasr Hassanien +2 more
core +2 more sources
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
doaj +1 more source