Study on applicability of Lorentz transformations in accurately explaining influence of refractive index on Doppler frequency shift
Sign Up to like & getrecommendations! Published in 2025 at "Physica Scripta"
DOI: 10.1088/1402-4896/adddfc
Abstract: Influence of refractive index on Doppler frequency shift (DFS) have been clearly demonstrated by the observations of regular and inverse Doppler effects occurring, respectively, in positive and negative index materials. Following special relativity, expression of… read more here.
Keywords: doppler; doppler frequency; index doppler; refractive index ... See more keywords
Human Micro-Doppler Frequency Estimation Approach for Doppler Radar
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2793277
Abstract: Micro-Doppler frequency estimation is an important issue for radar target recognition. In this paper, a novel approach is proposed to accurately estimate the micro-Doppler frequencies of specific target scattering parts, which can be very promising… read more here.
Keywords: micro doppler; doppler; doppler frequency; frequency estimation ... See more keywords
Wideband Doppler Frequency Shift Measurement and Direction Discrimination Based on a DPMZM
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2017.2676988
Abstract: A wideband microwave Doppler frequency shift (DFS) measurement approach based on a single dual-parallel Mach–Zehnder modulator (DPMZM) is proposed and experimentally demonstrated. The light wave is modulated by the transmitted and echo signals in the… read more here.
Keywords: frequency shift; doppler frequency; wideband doppler;
A Photonic Approach for Doppler Frequency Shift Measurement With Dispersion Medium
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2020.3015721
Abstract: We propose and experimentally demonstrate a novel and simple approach to identifying both the direction and value of Doppler frequency shift (DFS) in this paper. A pair of phase modulators, as well as a dispersion… read more here.
Keywords: approach; dispersion medium; doppler frequency; dispersion ... See more keywords
Iterative Doppler Frequency Offset Estimation in Satellite High-Mobility Communications
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2020.3005497
Abstract: Satellite communication systems are able to provide diverse services for ground terminals in ubiquitous global coverage, which play a vital role in high-mobility communication environments. Existing technologies developed primarily for satellite communications cannot be readily… read more here.
Keywords: mobility; satellite high; high mobility; frequency offset ... See more keywords
On Noncoherent FSK Reception With Doppler Frequency Uncertainty for Space Communications
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Journal on Selected Areas in Communications"
DOI: 10.1109/jsac.2024.3365881
Abstract: This paper studies the mutual information for a general form of orthogonal M-ary frequency-shift keying (MFSK) modulations with non-coherent detection and Doppler frequency uncertainty at the receiver. The signal model includes as particular cases classical… read more here.
Keywords: space communications; doppler frequency; frequency uncertainty; frequency ... See more keywords
Geometric Analysis of the Doppler Frequency for General Non-Stationary 3D Mobile-to-Mobile Channels Based on Prolate Spheroidal Coordinates
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Vehicular Technology"
DOI: 10.1109/tvt.2020.3011408
Abstract: Mobile-to-mobile channels often exhibit time-variant Doppler frequency shifts due to the movement of transmitter and receiver. An accurate description of the Doppler frequency turns out to be very difficult in Cartesian coordinates and any subsequent… read more here.
Keywords: prolate spheroidal; doppler frequency; mobile mobile; doppler ... See more keywords
Orthogonal Doppler Frequency Modulation over Doubly Selective Channels
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Wireless Communications"
DOI: 10.1109/twc.2025.3631567
Abstract: In this paper, we present a novel orthogonal Doppler frequency modulation (ODFM) to meet the challenging requirements of high-mobility communications. Firstly, we revisit the basic concepts of multicarrier modulations (MCMs) and discuss the capability to… read more here.
Keywords: time; doppler frequency; modulation; orthogonal doppler ... See more keywords
A Micro-Doppler Frequency Ambiguity Resolution Method Based on Complex-Valued U-Net
Sign Up to like & getrecommendations! Published in 2021 at "Mathematical Problems in Engineering"
DOI: 10.1155/2021/2016816
Abstract: In order to resolute the micro-Doppler frequency ambiguity caused by radar pulse repetition frequency not high enough (i.e., pulse dimension does not satisfy the requirement of Nyquist sampling theorem), this paper presents a micro-Doppler frequency… read more here.
Keywords: frequency ambiguity; frequency; micro doppler; doppler frequency ... See more keywords
Ultralow Doppler frequency extraction for the self-mixing dual-frequency laser velocimetry.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.455671
Abstract: In self-mixing dual-frequency laser Doppler velocimetry, the self-mixing Doppler frequency shift of the optical frequency difference is a linear function of the velocity of an external dynamic object; however, it is always ultralow for signal… read more here.
Keywords: frequency; extraction; doppler frequency; velocimetry ... See more keywords
Photonic approach for Doppler-frequency-shift and angle-of-arrival measurement with direction unambiguity and high precision.
Sign Up to like & getrecommendations! Published in 2023 at "Applied optics"
DOI: 10.1364/ao.476983
Abstract: A novel, to the best of our knowledge, scheme based on a dual-drive Mach-Zehnder modulator (DDMZM) is proposed for Doppler-frequency-shift (DFS) and angle-of-arrival (AOA) measurement without direction ambiguity. The echo signal from one antenna is… read more here.
Keywords: angle arrival; aoa measurement; frequency; doppler frequency ... See more keywords