In this chapter, we have presented a baseband receiver that allows an analytical treatment of the output of a SCAT-like processing and that can also be applied to RF signals. The output of the Baseband SCAT (BSCT) has been compared analytically with that of a conventional matched filter for two closely spaced scatterers. Results have shown that a bat-inspired spectrogram transformation can provide better range resolution performance than that of a conventional matched filter. The results have been derived analytically and then verified with a set of laboratory experiments at ultrasound, using phantom echoes and real targets, to assess the robustness of the algorithm with respect to operational hardware limitations and propagation effects.

Chapter Contents:

• 3.1 Introduction
• 3.2 Description of the spectrogram correlation and transformation model
• 3.2.1 Cochlear block
• 3.2.2 Temporal block
• 3.2.3 Spectral block
• 3.2.4 Model output
• 3.3 The baseband spectrogram transformation receiver
• 3.4 Response of the BSCT to two closely spaced ideal reflectors
• 3.4.1 Central lobe suppression
• 3.5 Experimental setup and data collection
• 3.5.1 General settings and equipment
• 3.5.2 Simulations
• 3.5.3 Phantom targets
• 3.5.4 Physical targets
• 3.6 Results
• 3.7 Conclusion
• References

Inspec keywords: radar resolution

Other keywords: spectrogram correlation and transformation receiver; enhanced range resolution; baseband SCAT receiver; bat-inspired spectrogram transformation

Subjects: Signal processing and detection; Radar equipment, systems and applications