Comparison of Two Waveform Design Methods Based on MI and SINR

2013 ◽  
Vol 427-429 ◽  
pp. 1076-1079
Author(s):  
Bin Wang ◽  
Jin Kuan Wang ◽  
Xin Song ◽  
Feng Ming Xin
Keyword(s):  
System Design ◽  
Energy Allocation ◽  
Waveform Design ◽  
Radar System ◽  
Design Methods ◽  
Signal Model ◽  
Ground Clutter ◽  
Radar Systems ◽  
Simulation Results

Modern radar systems should transmit different waveforms according to different environment. Waveform design is an important problem in radar system design. In this paper, we compare two waveform design methods based on MI and SINR with the signal model of a Gaussian target ensemble in ground clutter. The simulation results show that for the different tasks of radar, the energy allocation modes are different. Finally, the whole paper is summarized.

Netted Radar System Design with Spread Spectrum Technology

2011 ◽  
Vol 55-57 ◽  
pp. 648-653
Author(s):  
Lian Qing Fu ◽  
Li Sheng Yang ◽  
Tao Wang ◽  
Qing Le Zhang
Keyword(s):  
System Design ◽  
Spread Spectrum ◽  
Cross Correlation ◽  
Mutual Interference ◽  
Radar System ◽  
Power Ratio ◽  
Emission Signal ◽  
Simulation Results ◽  
Correlation Properties

In this paper, a novel netted radar system is designed to reduce the influence of mutual interference between signals. The emission signals of all stations are assigned the orthogonal PN codes. Because of the good autocorrelation and cross-correlation properties, mutual interference becomes weaker and signals from different stations could be separated by the preassigned PN codes. At the same time, the spectrum of the emission signal is spreaded, the peak-to-mean envelope power ratio (PMEPR) and the intercepted probability of the signals descend therefore. Simulation results show the good performance of the proposed approach.

Mutual Information Model of Adaptive Waveform Design

2011 ◽  
Vol 460-461 ◽  
pp. 207-212
Author(s):  
Bin Wang ◽  
Jin Kuan Wang ◽  
Xin Song
Keyword(s):  
Mutual Information ◽  
Working Conditions ◽  
Information Model ◽  
Waveform Design ◽  
Radar Systems ◽  
Simulation Results

Traditional radar systems are lack of adaptivity to the environment. Modern radar systems should transmit different waveforms according to different environment. In this paper, mutual information model of adaptive waveform design is proposed. With this model, different waveforms can be designed adaptively under different radar working conditions. Simulation results demonstrate the validity of our model. Finally, the whole paper is summarized.

Cue Utilization, Perceptions, and Experience in the Interpretation of Weather Radar Returns

2018 ◽  
Vol 62 (1) ◽  
pp. 721-725
Author(s):  
Mark W. Wiggins ◽  
Monique Crane ◽  
Thomas Loveday
Keyword(s):  
System Design ◽  
Weather Radar ◽  
Radar System ◽  
Pilot Training ◽  
Online Assessment ◽  
Operational Experience ◽  
Cue Utilization ◽  
Flight Experience ◽  
Radar Systems

This study was designed to examine the role of cue utilization, perceptions, and measures of operational experience in the interpretation of a scenario involving the interpretation of weather radar returns. A total of 47 qualified pilots completed EXPERTise 2.0, an online assessment of cue utilization in the context of weather radar systems. They also completed a scenario involving the interpretation of weather radar returns which required an assessment as to whether they could continue the flight safely in the absence of a change in track or altitude. Consistent with research in other domains, the results revealed a relationship between performance and cue utilization. No relationships were evident on the basis of flight experience nor the inclination to use or trust weather radar systems. The results provide the basis for a tool that might be employed to assess pilots’ cue utilization, thereby enabling more targeted approaches to pilot training and weather radar system design.

Orthogonal Discrete Frequency-Phase Waveform Design Based on Hybrid Chaos for MIMO Radar

2014 ◽  
Vol 989-994 ◽  
pp. 3621-3624 ◽  
Author(s):  
Ya Nan Xie ◽  
Jia Jia Wang
Keyword(s):  
Numerical Simulation ◽  
Chaotic Maps ◽  
Waveform Design ◽  
Mimo Radar ◽  
Ambiguity Function ◽  
Signal Model ◽  
Discrete Frequency ◽  
Hybrid Modulation ◽  
Simulation Results ◽  
Frequency Phase

Based on the good correlation and randomness of chaos, this paper uses hybrid Bernouli and Logistic chaotic maps to increase the complexity of chaos, at the same time, we do a combination of discrete frequency coded of non full code sets and poly phase coded, and then hybrid modulation waveforms base on hybrid chaos is proposed for MIMO radar. On the basis of the expression of average ambiguity function is derived, the average fuzzy characteristics of signal waveforms and orthogonality are analyzed in theory. Finally, numerical simulation results validate the correctness of the analysis and the reliability of the signal model.

scholarly journals Reinforcement Learning-Based Anti-Jamming in Networked UAV Radar Systems

2019 ◽  
Vol 9 (23) ◽  
pp. 5173 ◽  
Author(s):  
Wu ◽  
Wang ◽  
Li ◽  
Zhang ◽  
Peng
Keyword(s):  
Reinforcement Learning ◽  
Information Acquisition ◽  
Radar System ◽  
Learning Method ◽  
Q Learning ◽  
Radar Systems ◽  
Aerial Vehicle ◽  
Simulation Results ◽  
Joint Programming ◽  
Radar Information

The networked unmanned aerial vehicle (UAV) radar system may exploit inter-UAV cooperation for enhancing information acquisition capabilities, meanwhile its inter-UAV communications may be interfered with by external jammers. This paper is devoted to quantifying and optimizing the anti-jamming performance of networked UAV radar systems in adversarial electromagnetic environments. Firstly, instead of using the conventional metric of signal-to-interference ratio (SIR), this paper explores use of the theory of radar information representation as the basis of evaluating the information acquisition capabilities of the networked UAV radar systems. Secondly, this paper proposes a modified Q-Learning method based on double greedy algorithm to optimize the anti-jamming performance of the networked UAV radar systems, through joint programming in the frequency-motion-antenna domain. Simulation results prove the effectiveness of the algorithm in two different networking scenarios.

FEATURES OF CONSTRUCTION OF ON-BOARD HELICOPTER RADAR ICE EXPLORATION ON BASIS OF CIRCULAR GROUND SURFACE WITH SYNTHESIS OF APERTURE ROTATING ANTENNA

2019 ◽  
pp. 31-37
Author(s):  
I. G. Antсev ◽  
A. P. Aleshkin ◽  
V. V. Vladimirov ◽  
E. O. Kudrina ◽  
O. L. Polonchik ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Ground Surface ◽  
Rotor Blades ◽  
Navigation Systems ◽  
Propeller Blade ◽  
Antenna Aperture ◽  
Sensing System ◽  
Radar Systems ◽  
Simulation Results ◽  
Circular Antenna Array

The results of modeling the processes of receiving and processing the signals of remote sensing of the Earth’s surface using helicopter radar and synthesizing the antenna aperture due to its placement on the rotating rotor blades are presented. The mathematical correctness of the application of the developed algorithms for processing probing signals, as well as the uniqueness of the measurements, was confirmed. At the same time, the dimensions of the synthesized aperture due to the rotation of the radiator placed at the end of the propeller blade are equivalent to a circular antenna array with a diameter of tens of meters. The functionality of the remote sensing system based on this radar meets the requirements for ice observation and navigation systems for seagoing ships off the coast. The simulation results confirm the promise of further research in this direction and can be used in the development of radar systems with synthesized antenna aperture mounted on rotating rotor blades.

scholarly journals Ground Moving Target Imaging via SDAP-ISAR Processing: Review and New Trends

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2391
Author(s):  
Marco Martorella ◽  
Samuele Gelli ◽  
Alessio Bacci
Keyword(s):  
Homeland Security ◽  
Moving Target ◽  
Security Applications ◽  
Ground Clutter ◽  
Radar Systems ◽  
Joint Application ◽  
Target Imaging ◽  
Moving Target Imaging ◽  
Space Time Adaptive Processing ◽  
Border Surveillance

Ground moving target imaging finds its main applications in both military and homeland security applications, with examples in operations of intelligence, surveillance and reconnaissance (ISR) as well as border surveillance. When such an operation is performed from the air looking down towards the ground, the clutter return may be comparable or even stronger than the target’s, making the latter hard to be detected and imaged. In order to solve this problem, multichannel radar systems are used that are able to remove the ground clutter and effectively detect and image moving targets. In this feature paper, the latest findings in the area of Ground Moving Target Imaging are revisited that see the joint application of Space-Time Adaptive Processing and Inverse Synthetic Aperture Radar Imaging. The theoretical aspects analysed in this paper are supported by practical evidence and followed by application-oriented discussions.

Waveform design for TDM-MIMO radar systems

2020 ◽  
Vol 167 ◽  
pp. 107307
Author(s):  
M. Bagher Alaie ◽  
Seyed Ahmad Olamaei
Keyword(s):  
Waveform Design ◽  
Mimo Radar ◽  
Radar Systems
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