Modulation, Resolution and Signal Processing in Radar, Sonar and Related Systems
International Series of Monographs in Electronics and Instrumentation
Published on 9. May 2014
196 pages
978-1-4831-8569-9 (ISBN)
Description
Electronics and Instrumentation, Volume 35: Modulation, Resolution and Signal Processing in Radar, Sonar and Related Systems presents the practical limitations and potentialities of advanced modulation systems. This book discusses the concepts and techniques in the radar context, but they are equally essential to sonar and to a wide range of signaling and data-processing applications, including seismology, radio astronomy, and band-spread communications. Organized into 15 chapters, this volume begins with an overview of the principal developments sought in pulse radar. This text then provides a discussion and analysis of a wide range of various modulation systems. Other chapters consider the intrinsic Doppler resolving power of a radar system. This book discusses as well the power illuminating a radar or sonar target that may be comprised of one or more discrete pulses. The final chapter deals with the transmitter-modulator circuits and valves. This book is a valuable resource for electronic engineers and scientists.
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Content
AbstractAcknowledgments1. Introduction2. Discriminating and Resolving Power (a) General (b) Simple Systems (i) A Single, Simple Pulse (ii) "Pure" Continuous Wave (c) Pulse Trains (i) A Simple Pulse Train (ii) Irregularly Spaced Pulses (d) Long, Modulated Pulses (i) A Single, Long Pulse (ii) Trains of Long, Modulated Pulses3. Generalized Resolving and Discriminating Power in the Range-Doppler and Time-Bandwidth Planes (a) Review of Examples (b) Ab Initio Derivation of Resolving and Discriminating Power (i) Resolving Power (ii) Relations Between Resolving and Discriminating Power (iii) General (c) Limiting Resolving Power4. Intra-Pulse Modulated Systems (a) Phase-Modulated Single Pulses (i) Random Phase-Shift Modulation (ii) Quantized Phase Shifts (b) Single, Long, Frequency-Modulated Pulses (i) Quasi-Random Frequency Steps (ii) Linear Frequency Modulation (iii) Hyperbolic Frequency Modulation (iv) Multiple Linear Frequency Modulation (c) On-off Modulation of Single Pulses (d) Relations Between Certain Long-pulse Systems (i) Single, Long, Modulated Pulses (ii) Trains of Long, Modulated Pulses5. Pulse Stretching and Coherent Recompression (a) General (b) Pulse Stretching and Recompression by a Common Network (c) Delay Lines for Pulse Stretching or Compression (i) Dispersive Lines for Frequency-Modulation Systems (ii) A Delay-Line Loop to Generate Stepped-Frequency Modulation (iii) The Number of Elements in a Delay Line (d) Generalized Signal-Space Transformations6. Allowing for Target Velocity (a) The Effects of Target Velocity (b) Common Features in the Doppler Effect and Pulse Compression (c) Practical Doppler Requirements7. Doppler-Determination and Anti-Clutter Techniques (a) Within-Pulse, Time-shared Doppler Discrimination (b) A Delay-Line Integrator with Between-pulse, Time-Shared Doppler Discrimination (c) "Split-Pulse" Velocity Measurement (i) Time-Spaced Pulses (ii) Frequency-Spaced Pulses (d) Moving-Target Indication (M.T.I.) (e) Non-Linear Interference-Suppression Techniques8. Interactions Between Modulation, Data Processing and Aerial Design (a) Aerial Gain (b) Aerial Response Time (c) Extension of Resolution Limit to Include Aerial Scan (d) Combined Resolution in Range, Doppler and Angle (e) Modulation Scanning of a Linear-Array Aerial (f ) Modulation Scanning of a Circular Array (g) Pattern Synthesis from Incomplete Aerial Arrays (i) Interferometers (ii) Aperture Synthesis from Limited Samples (iii) Some Features of Incompletely Filled Apertures (iv) Sequential Aperture Synthesis (v) Analogies in the Frequency and Time Dimensions (h) The Constant-area Coverage Law (i) General (ii) The Gain of a "Cosec2" Aerial (j) "Cosecant" Vertical Taper of Observation Time9. Ambiguity Functions (a) The Concept of the Ambiguity Function (i) Range Side Lobes (ii) The Range-Doppler Ambiguity Function (b) Formulation of the Ambiguity Function (c) The Power in an Ambiguity Function10. Discrimination and Side-Lobes (a) Generalized Discrimination (b) Side-lobes in an Ambiguity Function (i) The Total Relative Side Lobe Energy (ii) The Significance of Side Lobes (iii) Relative Side-Lobe Amplitudes (c) The Effect of Taper (i) The Use of Taper (ii) Variants of Taper (iii) Tapered, Weighted Phase-Step Modulation (d) Varying Resolution Requirements11.
