Results 51 to 60 of about 34,935 (182)
Optimal Zak-OTFS Receiver and Its Relation to the Radar Matched Filter
IEEE Open Journal of the Communications SocietyThis paper presents optimal receiver implementations for Zak-OTFS modulation. Zak-OTFS has a receiver structure that includes a twisted convolution filter followed by delay-Doppler domain sampling.
Swaroop Gopalam +3 more
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Density Criteria for the Identification of Linear Time-Varying Systems
, 2015 This paper addresses the problem of identifying a linear time-varying (LTV) system characterized by a (possibly infinite) discrete set of delays and Doppler shifts. We prove that stable identifiability is possible if the upper uniform Beurling density of
Aubel, Céline, Bölcskei, Helmut
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Including antenna mispointing in a semi-analytical model for delay/Doppler altimetry [PDF]
, 2015 International audienceDelay/Doppler altimetry aims at reducing the measurementnoise and increasing the along-track resolution in comparison with conventional pulse limited altimetry. In a previous paper, we have proposed a semi-analytical model for delay/
Boy, François +4 more
core +4 more sources
Terrestrial, Atmospheric and Oceanic SciencesThe delay-Doppler map (DDM) is the signal power distribution of the Coarse/Acquisition code (C/A code) of the received Global Navigation Satellite System (GNSS) signal in different code phase delay and Doppler frequency.
Wen-Hao Yeh +2 more
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Ambiguity and area preserving linear transformations in over‐the‐horizon radar
IET Radar, Sonar & NavigationThe use of recurrent waveforms in over‐the‐horizon radar (OTHR) necessitates techniques for ambiguity resolution and manipulation. This paper provides a number of techniques for manipulating the shape of radar ambiguity functions.
Stephen D. Howard, Van Khanh Nguyen
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Joint estimation of target time delay and Doppler frequency in passive radar system
Tongxin xuebao, 2015 A novel method of joint estimation of time delay and Doppler shift in passive radar system based on short-time fractional Fourier transform (STFRFT) was proposed.Firstly,the mathematical expression of the STFRFT time-frequency resolution was studied for ...
ANGPeng W +3 more
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International Journal of Antennas and Propagation, 2023 The azimuth, elevation, time delay (TD), and Doppler shift (DS) of the target echo signal are important parameters for target localization in passive radar.
Jing Yang +6 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Synthetic aperture radar (SAR) focusing will be a fundamental step in the analysis of the radar sounding datasets collected by the Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON) instrument as part of NASA's upcoming ...
Kirk M. Scanlan +5 more
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Coordinating Complementary Waveforms for Sidelobe Suppression
, 2011 We present a general method for constructing radar transmit pulse trains and receive filters for which the radar point-spread function in delay and Doppler, given by the cross-ambiguity function of the transmit pulse train and the pulse train used in the
Calderbank, Robert +4 more
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Discrete radar based on modulo arithmetic
EURASIP Journal on Advances in Signal ProcessingZak-OTFS is a modulation scheme where signals are formed in the delay–Doppler (DD) domain, converted to the time domain (DD) for transmission and reception, then returned to the DD domain for processing.
Nishant Mehrotra +4 more
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