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Fundamentals of Short-Range FM Radar

Fundamentals of Short-Range FM Radar by Igor Komarov
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Here’s a unique new resource that offers you a solid understanding of the fundamental theory, operation principles and applications of short-range frequency modulated continuous wave (FM CW) radar. You learn how to choose the structural scheme of short-range FM radar, and determine the optimal algorithm of useful signal processing necessary for ensuring the technical characteristic of radar. Moreover, this practical reference shows you how to ensure the minimum level of radar signal parasitic amplitude, calculate modulation signal distortion, and compensate for nonlinear distortion.

For the first time in any book, you find detailed coverage of the theory and calculations of autodyne radar, helping you avoid typical mistakes with your work in this area. Other critical discussions include the parameters of UHF unit output signals and the principles of regime optimization. Supported over 750 equations, the book saves you valuable time in solving problems, so you can focus on your analysis.

The original application of low-cost, lightweight FMCW radar technology was in proximity fuzes for artillery projectiles, where production lots of thousands or more were typical, with small size, low cost, reliability and freedom from jamming vulnerability were essential features. Little has been published in this area because of the military nature of the application. More recently, as the technology has become familiar to engineers in civil areas, applications to industrial measurements and vehicle navigation have become apparent. Here, also, the advantages of small size and low cost make FMCW radar technology suitable for large-scale use in the industrial and consumer market. With the information available for the first time in this book, many new applications will be found for short-range FMCW radar.



Introduction to Frequency-Modulated Continuous-Wave Radar - Brief History. Examples of Use of FMCW Radar.

Basic Theory of Short-Range FM Radar - Principle of Operation and Basic Block Diagram of FM Radar. Typical Block Diagram of Short-Range FM Radar. General Expressions for Transmitted, Reflected and Converted Signals. General Relationships for the Converted Signal with Modulation by a Periodic Function. General Relations for a Converted Signal with Dual-Frequency Modulation. General Relations for a converted Signal with Modulation by a Modulated Periodic Function. Block Diagrams of Ultrasonic SRR and Features of the Converted Signal.

Characteristics of the Converted Signal with Different Transmitter Modulations - Sinusoidal Modulation. Linear Frequency Modulation. Discrete Modulation. Effects of Transmitter Modulation Nonlinearity on Converted Signal Parameters.

Integrated Methods of Converted Signal Processing - General Description. Influence of Parasitic Amplitude Modulation of the Transmission on Operation of the SRR Receiver. Stabilization of the Frequency Deviation. Frequency Processing of the Converted Signal. Phase Processing of the Converted Signal.

Spectral Methods of Processing the Converted Signal - General Description. Range Resolution. Radar Scan of Range. Spectral Processing Using the Parasitic AM Signal. Signal Processing on Separate Components of the Converted Signal Spectrum.

Analysis of Constant Frequency Oscillators - Rule for Obtaining the Abbreviated Equations. Substantiation of the SAE Method. Examples of Deriving the Abbreviated Equations. General Abbreviated and Characteristic Equations of Anisochronous Oscillators.

Analysis of FM Systems Using Symbolical Abbreviated Equations - Symbolical Abbreviated Equations for Controlled Self-Oscillatory Systems of Any Kind. Methods of Symbolical Abbreviated Equations for FM Systems. Differential Equations of Some FM Systems. Abbreviated Differential Equations of Single-Tuned Oscillators with Sinusoidal FM. Parasite Amplitude Modulation in Autodynes for Various Types of Frequency Modulation.

Output Voltage of a Frequency-Controlled Oscillator - Change of Output Voltage for Oscillators Tuned Discretely in Time. Parasitic Amplitude Modulation of Oscillations in Ideal Single-Tuned Circuits with Modulation of their Natural Frequencies. Parasitic Amplitude Modulation of Output Voltage in Single-Tuned Oscillators with Frequency Modulation. Use of a Varicap as the Frequency Controller.

Nonlinearity and Linearization in Varactor Control of FM Oscillators - Nonlinearity of Frequency Dependence of Single-Tuned Oscillators on Control Voltage of the Varactor with Large Frequency Changes.

Nonlinear Distortions with Frequency Modulation Using Varactors. Linearization of Dependence of Oscillator Frequency on Control Voltage. Calculation of Diode-Resistive Correction Circuits. Decreasing the Nonlinear Distortion of the FM Signal with a Correcting Signal.

Theory of the Single-Tuned Transistor Autodyne and Optimization of its Modes - Abbreviated Differential Equations for the Single-Tuned Transistor Autodyne. Linearized Differential Equations of Autodynes for Small Reflected Signals. Equivalent Circuits of Autodynes for Small Reflected Signals. The Form and Spectrum of the Output Signal of a Single-Tuned Transistor Autodyne. Form and Spectrum of the High-Frequency Signal from an FM Transistor Autodyne. Transfer Factors of an Autodyne on a Voltage and a Current and Mode Optimization.

Autodyne Modes of Transistor Oscillators with Strong Interference - The Common Properties of Autodyne Modes of the Single-Tuned Synchronized Oscillator. Transfer Factor of an Autodyne Subject to Synchronous Jamming. Bifurcations of Periodic Variations in the Synchronized Autodyne.

References. List of Symbols. About the Authors. Index.

Igor V. Komarov served as a professor, chief scientist, deputy head of the Radio Receivers Department, and deputy dean of the Radio Engineering Department at the Moscow Power Engineering Institute, where he earned a Ph.D. in radiolocation and radionavigation. Now retired, his recent work involves conversion directions of short radar systems development.

Sergey M. Smolskiy is head of the Radio Receivers Department, full professor, and deputy director of the Institute of Radio Engineering and Electronics at the Moscow Power Engineering Institute. He earned his Ph.D. in theoretical radio engineering at the Moscow Power Engineering Institute and his Doctor of Sciences degree in radar and navigating systems at the Moscow State University of Civil Aviation Engineers.

Artech House; August 2003
303 pages; ISBN 9781580537339
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Title: Fundamentals of Short-Range FM Radar
Author: Igor Komarov; Sergey Smolskiy