The Battle Field Sensing Radar (BFSR) is a fully coherent Pulse-Doppler radar. It works at a very low peak power of 5W that makes it difficult to detect by enemy sensors. The radar operates over 21 channels in J band (10 to 18/20 GHz). It can be operated in all weather conditions, and during day and night. It is portable and can be mounted on vehciles.
The Doppler sound effects from above 4 sources
The training process involves collecting the data from different radar setups. Each of such data collected is sanitized, this involves removing background noises, removing silence and then clipping them to appropriate size. The sanitized wave files are then transformed to spectrograms using fast Fourier transform. Thus, sanitized data is then passed to a custom T
Fig 1. Sample FFT generated spectrograph of doppler sound spanning 1 second, first one is from group of man, second is from a light vehicle.
For predicting, the real time data is captured from the radars audio port. This data is also sanitized and clipped to appropriate size. The predictor with the model then classifies the input signal into one of the categories with a confidence value. This value can help tune the sensitivity of the prediction algorithm.
The two phases are depicted in the diagram below.
Fig 2. Shows the logical flow of events for the two phases 1. Training and 2. Prediction.
It is important that false positives are utterly avoided. With
As we speak the data is being collected across various terrains to improve the target classification.
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