Results 11 to 20 of about 34,935 (182)
A Generalized Semi-Analytical model for delay/Doppler altimetry [PDF]
2014 IEEE Geoscience and Remote Sensing Symposium, 2014 International audienceThis paper introduces a new model for delay/Doppler altimetry, taking into account the effect of antenna mispointing. After defining the proposed model, the effect of the antenna mispointing on the altimetric waveform is analyzed as
Boy, François +4 more
core +5 more sources
Delay-Doppler Channel Estimation with Almost Linear Complexity [PDF]
IEEE Transactions on Information Theory, 2012 A fundamental task in wireless communication is Channel Estimation: Compute the channel parameters a signal undergoes while traveling from a transmitter to a receiver.
Fish, Alexander +4 more
core +2 more sources
Sentinel-3 Delay-Doppler altimetry over Antarctica [PDF]
The Cryosphere, 2019 The launch of Sentinel-3A in February 2016 represented the beginning of a new long-term series of operational satellite radar altimeters, which will provide Delay-Doppler altimetry measurements over ice sheets for decades to come.
M. McMillan +9 more
doaj +6 more sources
Rethink delay Doppler channels and time-frequency coding
Journal of Information and IntelligenceIn this paper, we rethink delay Doppler channels (also called doubly selective channels). We prove that no modulation schemes (including the current active VOFDM/OTFS) can compensate a non-trivial Doppler spread well. We then discuss some of the existing
Xiang-Gen Xia
doaj +3 more sources
On Delay-Doppler Plane Orthogonal Pulse
GLOBECOM 2022 - 2022 IEEE Global Communications Conference, 2022 This paper was presented at the IEEE GLOBECOM ...
Hai Lin 0001, Jinhong Yuan
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On the Pulse Shaping for Delay-Doppler Communications
GLOBECOM 2023 - 2023 IEEE Global Communications Conference, 2023 In this paper, we study the pulse shaping for delay-Doppler (DD) communications. We start with constructing a basis function in the DD domain following the properties of the Zak transform. Particularly, we show that the constructed basis functions are globally quasi-periodic while locally twisted-shifted, and their significance in time and frequency ...
Shuangyang Li +5 more
openaire +2 more sources
Modeling the Effects of Topography on Delay-Doppler Maps [PDF]
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020 A method for simulating delay-Doppler maps (DDMs) of global navigation satellite system signals reflected from land surfaces with heterogeneous terrain is developed from first principles. The method follows previous work for ocean DDMs in the geometric optics limit of the Kirchhoff approximation.
James D. Campbell +2 more
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Orthogonal Delay-Doppler Division Multiplexing Modulation
IEEE Transactions on Wireless Communications, 2022 Inspired by the orthogonal time frequency space (OTFS) modulation, in this paper, we consider designing a multicarrier (MC) modulation on delay-Doppler (DD) plane, to couple the modulated signal with a doubly-selective channel having DD resolutions. A key challenge for the design of DD plane MC modulation is to investigate whether a realizable pulse ...
Hai Lin 0001, Jinhong Yuan
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Auto-Encoder Based Orthogonal Time Frequency Space Modulation and Detection With Meta-Learning
IEEE Access, 2023 To tackle a Doppler sensitivity problem of orthogonal frequency division multiplexing (OFDM), orthogonal time frequency space (OTFS) has been investigated, where information is carried over delay-Doppler domain.
Jaehyun Park +3 more
doaj +1 more source
Analyzing Anomalous Artefacts in TDS-1 Delay Doppler Maps [PDF]
, 2019 © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Benson, Craig +5 more
core +1 more source