Baseband version of the bat-inspired spectrogram correlation and transformation receiver

2017 IEEE Radar Conference (RadarConf)

Balleri

Stove³

et al. 2017

Self Cite

Echolocating bats show a unique ability to detect, resolve and discriminate targets. The Spectrogram Correlation and Transformation (SCAT) receiver is a model of the Eptesicus fuscus auditory system that presents key signal processing differences compared to radar which may offer useful lessons for improvement. A baseband version of the SCAT is used to investigate advantages and disadvantages of bat-like signal processing against the task of target resolution. The baseband receiver is applied to RF experimental data and results show higher range resolution than the reciprocal of the transmitted bandwidth can be achieved for two closely spaced scatterers.

“…The BSCT was developed to allow an analytical treatment of the spectral output of the SCAT [20]. A block digram of the BSCT is shown in Fig.1.…”

Section: Bio-inspired Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio-inspired two target resolution at radio frequencies

2017 IEEE Radar Conference (RadarConf)

Balleri

Stove³

et al. 2017

Self Cite

“…2). The equivalence to the original SCAT was demonstrated experimentally in [19]. In the spectral block, the total energy of the output of each filter is computed by integration (Fig.…”

Section: Baseband Scat (Bsct) Receivermentioning

confidence: 99%

“…The Baseband SCAT (BSCT) is a receiver that was developed based on the SCAT model to allow a mathematical treatment of the output of the SCAT and the processing of signals centred on very high carrier frequencies [19].…”

Section: Introductionmentioning

confidence: 99%

Bio‐inspired processing of radar target echoes

IET Radar, Sonar & Navigation

Balleri

Stove³

et al. 2018

Self Cite

Echolocating bats have evolved the ability to detect, resolve and discriminate targets in highly challenging environments using biological sonar. The way bats process signals in the receiving auditory system is not the same as that of radar and sonar and hence investigating differences and similarities might provide useful lessons to improve synthetic sensors. The Spectrogram Correlation And Transformation receiver (SCAT) is an existing model of the bat auditory system that takes into account the physiology and the neural organisation of bats that emit broadband signals. In this paper, we present a baseband receiver equivalent to the SCAT that allows an analysis of target echoes at baseband. The Baseband SCAT (BSCT) is used to investigate the output of the bat-auditory model for two closely spaced scatterers and to carry out an analysis of range resolution performance and a comparison with the conventional matched filter. Results firstly show that the BSCT provides improved resolution performance. It is then demonstrated that the output of the BSCT can be obtained with an equivalent matched-filter based receiver. The results are verified with a set of laboratory experiments at radio frequencies in high Signal to Noise Ratio (SNR).

Noise sensitivity of a bio-inspired echolocation model

IOP Conf. Ser.: Mater. Sci. Eng.

Nikolova

2019

The Spectrogram Correlation And Transformation (SCAT) receiver is often cited as a model of bat auditory system that is responsible for echolocation signal processing and super resolution in range. We explore the response of a simplified baseband version of SCAT (BSCT) for two targets in white Gaussian noise. Knowing the loss of signal-to-noise ratio (SNR) relative to the matched filter (MF) is important for any practical applications of the algorithm. We show that this loss is 6~dB and increases if a critical noise level is surpassed.