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Frequency coded waveforms for enhanced delay-Doppler resolution
Proceedings of the 2002 IEEE Radar Conference (IEEE Cat. No.02CH37322), 2003In this paper, we propose techniques for the construction of frequency-coding sequences that give rise to frequency-coded waveforms having ambiguity functions with a clear area - containing no sidelobes - in a connected region surrounding the main lobe. These constructed sequences are called pushing sequences. First, two important properties of pushing
Chieh-Fu Chang, Mark R. Bell
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OTFS and Delay Doppler Communications
2023 28th Asia Pacific Conference on Communications (APCC), 2023Y. Hong, Masahiro Umehira
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1986
Abstract : The goal of this project is to formulate and investigate new approaches for forming images of radar targets from spotlight-mode, delay-doppler measurements. These measurements could be acquired with a high-resolution radar-imaging system operating with an optical- or radio-frequency carrier. Two approaches are under study.
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Abstract : The goal of this project is to formulate and investigate new approaches for forming images of radar targets from spotlight-mode, delay-doppler measurements. These measurements could be acquired with a high-resolution radar-imaging system operating with an optical- or radio-frequency carrier. Two approaches are under study.
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An algorithm for detecting closely spaced delay/Doppler components
1997 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2002This paper considers a method for estimating time delays, amplitudes, and Doppler scales of a multipath signal. The method is an extension of work previously reported by Manickam and Vaccaro (1993) which dealt solely with time delays and amplitudes, and extended by Habboosh and Vaccaro (see Proceedings CISS '96, p.633-8, 1996) to include Doppler scale.
Habboosh, Amir W. +2 more
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Differential delay/Doppler ML estimation with unknown signals
IEEE Transactions on Signal Processing, 1993Previously published analyses on the maximum-likelihood estimation of joint frequency and time offsets between two noisy versions of a common signal have assumed a Gaussian random signal with a known power spectrum. In many applications, the common signal is not Gaussian and there may be no prior knowledge of its detailed structure. Instead, estimation
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On the accuracy limits of misspecified delay-Doppler estimation
Signal Processing, 2023Hamish McPhee +3 more
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Fundamental dependencies in angle-delay-Doppler in wireless channels
2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004The degrees of freedom (DoF) in a wireless channel determine its statistics and capacity. The DoF in turn depend on the number and spatial distribution of physical propagation paths in the environment as well as the signal space dimensions (number of antennas, bandwidth).
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Delay-Doppler Communications: Principles and Applications
IEEE Communications Magazine, 2023openaire +1 more source