Having examined how a radar signal is generated, is emitted from the antenna, scatters from external objects, reenters the radar, and is recorded as a voltage by an A/D converter, we now begin consideration of how to interpret the resulting measurement. Throughout this chapter, the returned echo is considered as a signal voltage plus a noise voltage, both analog (continuous). Effects of AID quantization noise can be considered part of the noise voltage.

Chapter Contents:

• 4.1 Detection of Radar Signals in Noise and Clutter
• 4.1.1 Detector Characteristics
• 4.1.2 Fundamentals of Detection
• 4.1.3 Detection of Nonfluctuating Target in Noise
• 4.1.4 Detection of Fluctuating Target in Noise
• 4.1.5 Summary of Detection of Target in Noise
• 4.1.6 Binary and Cumulative Integration: Nonfluctuating Target
• 4.1.7 Targets in Clutter
• 4.2 Radar Waveforms
• 4.2.1 Generalized Radar Signals
• 4.2.2 Matched Filter
• 4.2.3 Matched-Filter Response to Its Delayed, Doppler-Shifted Signal
• 4.2.4 Radar Ambiguity Function
• 4.2.5 Example 1: One Monochromatic Pulse; Range and Velocity Resolution
• 4.2.6 Example 2: One Linear Frequency Modulated Pulse; Pulse Compression
• 4.2.7 Example 3: Coherent Pulse Train; Resolution and Ambiguity in Range and Velocity
• 4.2.8 Coherent Processing Interval
• 4.2.9 Example of CPI: The Search Radar Equation
• 4.3 Accuracy of Radar Measurements
• 4.3.1 Monochromatic Pulse
• 4.3.2 Cramer-Rao Bounds
• References
• Problems

Inspec keywords: analogue-digital conversion; radar signal processing; quantisation (signal); radar antennas

Other keywords: signal voltage; antenna; A/D converter; noise voltage; external objects; elementary radar signal processing; A/D quantization noise

Subjects: Single antennas; A/D and D/A convertors; Signal processing and detection; Radar equipment, systems and applications