Weather Radar Network With Pulse Compression of Arbitrary Nonlinear Waveforms: Ka-Band Test-Bed and Initial Observations

Kim, Hoon Lee and Yong-Hoon

doi:10.2528/pierb10071402

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…Inorder to utilize frequency response effectively and to gather multi-static information, lee and Kim adopts a radar network with shorter wavelength configurations which constitutes higher resolution Ka-band pulse compressive radars [22]. Field programmable gate array (FPGA) and direct digital synthesizer (DDS) generates linear as well as arbitrary nonlinear modulated frequency waveform for low ranged side-lobes.…”

Section: Introductionmentioning

confidence: 99%

Optimal Polyphase Coded Signal Design

Pandu,

Krishna

2019

IJRTE

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In the war prone global arena where every target of an enemy, on and off the land to be kept on eagle’s eye watch and to deceive enemy’s counter measure technologies, there is a strong requirement for most secured signal design which domicile maximum detection range along with high range resolution, to flare them up .The efficiency of the system mainly depends on how much power the generated pulse may possess in the main lobe to that of the side lobes and how independent they are from one another. The measure of Autocorrelation and cross correlation exhibited by polyphase coded sequence is determined mathematically. Multi input and multi output possesses best potential in mitigating the effects of fading, enhancing the resolution, suppressing the signal jamming and interference, which are all very useful in improving the target detection and recognition performance of the system. Recently, most optimization researches of polyphase codes are carried out by genetic algorithm (GA), Particle swarm optimization (PSO) and simulated annealing (SA) but this technique require more parameters for optimization. In order to overcome these difficulties modified PSO algorithm is adopted in the present research to optimize the polyphase coded sequence. The obtained codes are also put for Doppler resilience by including Doppler shift in the process of generation of the codes.

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Section: Introductionmentioning

confidence: 99%

Optimal Polyphase Coded Signal Design

Pandu,

Krishna

2019

IJRTE

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“…The frequency‐modulated continuous wave (FMCW) technique is widely used for weather radar systems . Recently, FMCW compact rain radar has designed to measure the localized heavy rain . It is important to improve the high resolution in order to archive good quality of precipitation measurement .…”

Section: Introductionmentioning

confidence: 99%

Design and initial measurements of K‐band FMCW rain radar with high resolution

Kong¹,

Jeong²,

Park

2016

Micro & Optical Tech Letters

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This paper presents an FMCW K‐band rain radar with the property of high resolution. The radar system was designed for measurement of localized torrential rain. Using DDS and FPGA control, heterodyne modulation was used to generate the FMCW down‐chirp signal with 50 MHz bandwidth, and emitted a K‐band signal with nominal power of 125 mW in the vertical direction. To obtain high resolution for the Doppler spectrum, the radar system used a coherent signal processing method. Several experiments were conducted and the results were compared with data from the meteorological administration. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:817–822, 2016

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“…The rapid expansion of vertical offset-fed (or offset) parabolic antenna in cloud, rain and weather radars is due to the advantages of its suppressed sidelobe level, higher aperture efficiency and the geometrical structure which the water does not collect into [1,2]. The antenna system that has separated transmitter and receiver antennas has good isolation level, and the separation wall between the two antennas further improves this level.…”

Section: Introductionmentioning

confidence: 99%

Design of Offset Dual-Reflector Antennas for Improving Isolation Level Between Transmitter and Receiver Antennas

Kong¹,

Kim²,

Aziz³

et al. 2015

PIER C

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This paper presents the improved isolation property of the signals among transmitter and receiver antennas. The separation wall is laid at the center of the antennas to improve the isolation level between them. The introduced separation wall has serrated edges mounted on three sides, i.e., top, left and right sides. These mounted serrated edges are implemented to reduce the diffraction which may occur due to the linear edge of the wall. The Fresnel diffraction problem has been solved using analytical method in order to get the optimized structure of the serration. The Fresnel diffraction patterns due to different sizes of the serration are obtained, and their relative powers are compared to each other. The implemented antenna system with the serration wall is composed of corrugated feed horn, orthogonal mode transducer, and offset dual-reflector parabolic antennas. The effect of serration is well demonstrated by the measurement of isolation level of the antenna system. The measured results show that the serrated edges enhanced the isolation property among transmitter and receiver antennas.

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Weather Radar Network With Pulse Compression of Arbitrary Nonlinear Waveforms: Ka-Band Test-Bed and Initial Observations

Cited by 6 publications

References 15 publications

Optimal Polyphase Coded Signal Design

Optimal Polyphase Coded Signal Design

Design and initial measurements of K‐band FMCW rain radar with high resolution

Design of Offset Dual-Reflector Antennas for Improving Isolation Level Between Transmitter and Receiver Antennas

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