ABSTRACT
Random signal radar refers to radars that transmit a microwave noise signal or a waveform modulated by a low-frequency random noise. The literature contains many descriptive terms for random signal radars, including noise modulation radar, correlation radar,
CONTENTS
6.1 Introduction to Random Signal Radar ........................................................................... 175 6.1.1 Overview of Random Signal Radar .................................................................... 175 6.1.2 History of Random Signal Radar ........................................................................ 176 6.1.3 Implementation Architectures of Random Signal Radar ................................ 178
6.1.3.1 The Correlation Receiver ........................................................................ 178 6.1.3.2 Spectrum Analysis Receiver .................................................................. 180 6.1.3.3 Digital Receiver ....................................................................................... 182
6.1.4 Processing Schemes for Random Signal Radar ................................................. 183 6.2 Combination of UWB and Random Signal Radar ........................................................ 185
6.2.1 Random Signal Generation .................................................................................. 186 6.2.2 UWB Carrier-Modulated Random Signal Radar .............................................. 187
6.2.2.1 Random Noise Radar ............................................................................. 187 6.2.2.2 Random Frequency Modulation Radar ............................................... 189 6.2.2.3 Random Phase Modulation Radar ....................................................... 190 6.2.2.4 Random Interrupted CW Radar ........................................................... 191
6.2.3 UWB Carrier-Free Impulse Radar with Random Coding ............................... 196 6.3 Advantages of UWB Random Signal Radar .................................................................. 199
6.3.1 Anti-RFI Capability ............................................................................................... 199 6.3.1.1 Narrowband RFI ..................................................................................... 199 6.3.1.2 Wideband RFI .......................................................................................... 202
6.3.2 Low Probability of Interception ........................................................................... 204 6.3.3 Electromagnetic Compatibility ............................................................................ 206
6.4 Applications of UWB Random Signal Radar ................................................................. 211 6.4.1 Detection of Buried Objects.................................................................................. 213 6.4.2 Short-Range SAR Imaging .................................................................................... 216 6.4.3 Remote Monitoring of Structural Changes ........................................................ 219 6.4.4 Future Potential Applications of Random Signal Radar ..................................222
