Dear all,
A new design block for RFI detection and excision is made available on the CASPER website on the following link: https://casper.berkeley.edu/wiki/Impulsive_RFI_Excision:_CASPER_Library_Block This block is intended for removing impulsive time domain (broadband) RFI. The design uses Median Absolute Deviation based robust estimator for computing standard deviation in presence of RFI (outliers). Detection and filtering threshold is computed based on this robust standard deviation. More details on the implementation of the block and test results are provided on the above mentioned link. The design has been tested on ROACH-1 for recorded and simulated data with RFI. Currently, the block can handle 8-bit fixed point data and a window size of 1024 samples and can be clocked up to 250 MHz. The block is being integrated and tested with GMRT's wide-band digital backend. This version is undergoing rigorous testing and improvements would be reflected in the subsequent versions. The design will be made more generic in near future. I hope this design block would be useful to the CASPER community and hope to get feedback and suggestions for the improvement of this block. Thanks & Regards, Kaushal D. Buch Digital Backend Group, GMRT, NCRA-TIFR, Pune, India 91-2132-258380 / 258365 [email protected]
