In this chapter, we carry out our analysis based on LFM waveforms. However, SFWF can also readily be applied without any changes. The radar, in fact, can be made switchable between these two waveforms.

Chapter Contents:

• 8.1 Basic Equations of FMCW Radars
• 8.2 Qualitative Requirements
• 8.2.1 Problem De?nition
• 8.2.2 Program Requirements
• 8.2.3 Overall System Requirements
• 8.2.4 Speci?c Radar Requirements
• 8.2.5 Assumed Parameters
• 8.2.6 Costing Requirements
• 8.3 The Pandora Radar Description
• 8.4 Basic Equations of FMCW Radars
• 8.5 Design Approach
• 8.5.1 Waveform Selection
• 8.6 Discussion on Sub-Systems
• 8.6.1 FMCW Waveform Generator
• 8.6.2 Power Combiner Block
• 8.6.3 Wideband Low Noise Ampli?er
• 8.6.4 Power Resolver Block
• 8.6.5 Heterodyne Receiver and Range Resolution Problem
• 8.6.6 Noncoherent Processor
• 8.6.7 High-Resolution FFT or Channel FFT
• 8.6.8 Baseband Filters
• 8.6.9 Stretch Processing
• 8.7 The Sampling Question
• 8.8 Need for a Delayed Sweep Oscillator
• 8.9 FMCW Waveform Trade-Offs
• 8.10 Channel Isolation and Group Delay Problems
• 8.11 Ambiguity Analysis: Pandora Radar
• 8.12 SFCW Signals
• 8.13 Conclusion on Ambiguity Analysis

Inspec keywords: CW radar; military radar

Other keywords: SFWF; LFM waveforms; design approach; multifrequency CW radars; Pandora radar; switchable

Subjects: Radar equipment, systems and applications; Radar and radiowave systems (military and defence)