A Gm-Compensated 46-101 GHz Broadband Power Amplifier for High-Resolution FMCW Radars

Wang, Dong; Shen, Zhengkun; Su, Xiaolei; Liu, Zexue; Tan, Yi; Chang, Xu; Liu, Junhua; Liao, Huailin

doi:10.1109/iscas51556.2021.9401773

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…The simulation is carried out for a range of frequencies of the probing signal 50-70 GHz, which corresponds to the capabilities of a modern radioelement base. Thus, modern amplifiers [22][23][24], mixers [25], single antennas and antenna arrays [26-28], digital signal processing devices [29,30] allow processing ultrawideband signals.…”

Section: Fig 2 Receiving Antenna Array Geometrymentioning

confidence: 99%

Mathematical description of imaging processes in ultra-wideband active aperture synthesis systems using stochastic sounding signals

Volosyuk

Zhyla

Павликов

et al. 2021

reks

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Mathematical models of the fields of stochastic ultra-wideband signals that are necessary for solving problems of aperture synthesis of images using active radar methods are presented. The expediency of using V-transformations in these problems has been substantiated, the effectiveness of which has already been proven for the mathematical description of ultra-wideband spatio-temporal fields in the methods of passive and active radar, as well as remote sensing, that are used to solve problems of radio astronomy, medicine, navigation. Using modern methods of mathematical analysis and the theory of ultra-wideband systems, the physical essence of radio images obtained with the help of algorithms for coherent and incoherent signal processing is investigated. According to these algorithms, it is proposed to divide images into coherent and incoherent. Coherent images include those in which its amplitude and phase are recorded separately. In the case of an incoherent image, only its amplitude (power or related characteristic) is recorded. To describe of the obtained radio image structure, new concepts of the spectral density of the complex spatial coherence function (SDCSCF) and the spectral density of the spatial autocorrelation function of the amplitude-phase distribution (SDFSAF APD) are introduced. Application-use of functions is expedient and fundamentally necessary for solving problems of aperture synthesis using stochastic ultra-wideband signals. A mathematical description of the structures obtained by aperture synthesis of radio images is given. Here, studies are conducted for the general case of using a continuous (idealized) aperture, and for using an antenna system with spatially separated receiving elements. Simulation of the heuristic synthesized algorithm for constructing incoherent radio images is conducted. The possibility of using antenna arrays and synthesized aperture synthesis algorithms for solving problems of image formation in a survey located directly under the aircraft (at sounding angles close to vertical) are substantiated.

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Section: Fig 2 Receiving Antenna Array Geometrymentioning

confidence: 99%

Mathematical description of imaging processes in ultra-wideband active aperture synthesis systems using stochastic sounding signals

Volosyuk

Zhyla

Павликов

et al. 2021

reks

View full text Add to dashboard Cite

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“…However, the operation algorithms of many existing RS provide for the processing of narrowband signals only. Latest advances in the radioelement base field have made it possible to create systems with ultra-wideband signals space-time processing [5,6]. Of particular interest in this area are the problems of spatially extended objects imaging using stochastic Ultra-WideBand (UWB) signals.…”

Section: Introductionmentioning

confidence: 99%

Practical imaging algorithms in ultra-wideband radar systems using active aperture synthesis and stochastic probing signals

Zhyla¹,

Volosyuk²,

Павликов³

et al. 2023

reks

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The subject of the manuscript is the algorithms for radar imaging. This research develops imaging methods and algorithms for wideband and ultrawideband active aperture synthesis systems with antenna arrays and stochastic probing signals. The use of antenna arrays makes it possible to obtain radar images without the need to move radar or antenna system in space. The use of wideband and ultra-wideband stochastic probing signals is justified by their narrow autocorrelation functions. This increased the resolution of the obtained images. The main idea of the proposed algorithms is to filter the original wideband signal into several narrowband processes. Furthermore, only the central frequencies of each narrowband signal were processed. This approach allows us to use the classical widespread methods of aperture synthesis for the case of a wideband signal. Usually, they are applicable only for narrowband signals that satisfy the condition of a quasi-monochromatic approximation. This significantly reduces the overall computational complexity of the imaging algorithm, which simplifies its further practical implementation on the existing radioelement base. Because of the simulation, a primary radar image has been obtained and the overall performance of the proposed approach to processing wideband signals has been confirmed. An increase in the quality of the obtained image when using a multiple of frequency ranges is shown. An experimental study of the effect of processing a wideband signal only at its centre frequency instead of the entire frequency band is conducted. During the experiment, the correlation functions of the signals received by two spaced receivers were obtained. As a result, the Van Cittert-Zernike theorem has been experimentally confirmed. It allows signal processing only at its centre frequency instead of the entire frequency band. Simultaneously, the prospect of expanding the bandwidth of the probing signal is indicated. It, in the presence of a wideband element base and devices for high-speed signal processing, will further increase the imaging resolution of a radar system.

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Aerospace Wide Swath Radio Vision Complex

Павликов

Volosyuk

Zhyla

et al. 2022

2022 IEEE 16th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TC

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A Gm-Compensated 46-101 GHz Broadband Power Amplifier for High-Resolution FMCW Radars

Cited by 4 publications

References 14 publications

Mathematical description of imaging processes in ultra-wideband active aperture synthesis systems using stochastic sounding signals

Mathematical description of imaging processes in ultra-wideband active aperture synthesis systems using stochastic sounding signals

Practical imaging algorithms in ultra-wideband radar systems using active aperture synthesis and stochastic probing signals

Aerospace Wide Swath Radio Vision Complex

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