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About this book

This book presents novel research ideas and offers insights into radar system design, artificial intelligence and signal processing applications. Further, it proposes a new concept of antenna spatial polarization characteristics (SPC), suggesting that the antenna polarization is a function of the spatial direction and providing new ideas for radar signal processing (RSP) and anti-jamming. It also discusses the design of an advanced signal-processing algorithm, and proposes new polarimetric and anti-jamming methods using antenna inherent properties. The book helps readers discover the potential of radar information processing and improve its anti-interference and target identification ability. It is of interest to university researchers, radar engineers and graduate students in computer science and electronics who wish to learn the core principles, methods, algorithms, and applications of RSP.

Table of Contents

Frontmatter

Chapter 1. Introduction

Electromagnetic environment in battlefields turns to be increasingly harsh and complex in future; therefore, various information-processing technologies are hence constantly developed and utilized to enhance the detection or sensing capability of sensor systems.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 2. Connotation and Representation of Spatial Polarization Characteristic

The concept of polarization is first defined in the field of optics, used to describe the phenomenon of directional oscillation of light. Therefore, it is also called directional oscillation. In fact, as a common nature of vector waves, polarization receives wide attention in the infrared, optical, radar and other fields. As far as radar is concerned, polarization describes the variation of the electric field vector of electromagnetic wave with time on the propagation cross section [1]. It reflects the vector characteristic of electromagnetic waves. Besides information of time domain, frequency domain and spatial, polarization is also available important information of electromagnetic waves.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 3. Spatial Polarization Characteristics of Aperture Antenna

Antenna is the image and emblem of radar, which is closely related to the radar system. The design of new radar should first select the antenna system and scheme. There are many kinds of antenna, which can be roughly divided into two categories: wire antenna and aperture antenna. Wire antenna consists basically of metal wires. This category includes dipole antenna, monopole antenna, coil antenna, helical antenna, Yagi antenna, logarithm periodic antenna, and traveling-wave antenna. Aperture antenna also known as aperture antenna is usually an aperture in a plane or curved face. This category includes horn antenna, reflector antenna, slot antenna, and microstrip antenna.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 4. Spatial Polarization Characteristics of Phased Array

With rapid development of polarization measurement technology, vector signal process and microwave technology, polarization information is sufficiently used to provide a potential technical approach for impairment of influence of adverse electromagnetic environment on the radar system, resistance to active jamming, suppression of environmental clutter, anti-stealth and target recognition and other aspects, being capable of effectively improving working performance of modern radars.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 5. Antenna Spatial Polarization Characteristics Measurement and Calibration

Measurement of target polarization characteristics is an important basic issue for recognition of radar target characteristics and target identification, and is widely concerned for a long time. Radar target can be considered a polarization changer, which is usually represented by a second-order complex matrix, and is solved through “receiving and measuring two target echo signal under orthogonal polarization electromagnetic wave excitation on two orthogonal polarization basis in a simultaneous or time-sharing manner”. However, from the prospect of engineering implementation, there are many technical difficulties to develop special target polarization characteristics measurement radar, such as improving orthogonal polarization channel separation degree, maintaining consistency in amplitude and phase of several polarization channels, and solving calibration of polarization measurement system.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 6. Matrix Measurement Method Based on Antenna Spatial Polarization Characteristics

Radar target polarization measurement is a basic problem in the field of radar polarization technology. How to acquire polarization information is undoubtedly a basic problem in the investigation of the radar detection technology.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Chapter 7. Blanketing Jamming Countermeasure Method Based on Spatial Polarization Characteristics of Antenna

In increasing complicated and adverse electromagnetic field in battlefield, survival ability and working performance of individual electronic information systems including modern radar, communication, navigation and reconnaissance systems faces increasingly stern challenges, so it is required to enhance anti-jamming ability, improve signal receiving quality and dig useful information to the highest extent.
Huanyao Dai, Xuesong Wang, Hong Xie, Shunping Xiao, Jia Luo

Backmatter

Additional information