Very Low Frequency Receiver front end with high sensitivity and frequency selectivity

ABSTRACT: This proposal presents a high performance digital receiver operating in the VLF/LF range (from 14 - 60 kHz). The system offers fine selectivity of one or more signals of interest (1 Hz or less tuning frequency). It also addresses issue with regards to interference mitigation. The proposed system also allows for monitoring the whole VLF band while extracting narrow band signals of interest. Adequate attention is paid to airborne operation in harsh environments. BENEFIT: The proposed system allows for the rapid development of a scalable, agile receiver, that can be readily adapted to handle current or future signals of interest through software modifications. The system also allows complete bandwidth control. The system is designed to use COTS parts, certified for military applications including EMP/HEMP and Nuclear radiation effects. The system will allow the USAF many years of use and upgradability.