Respond Projects

Satellite Data Acquisition

Very high data rate (up to 2GBPS) demodulator & Bitsynchronizer systems with programmability for multiple modulation & encoding schemes

Design & development of Demodulator using Parallelism techniques for handling High data rate(2GBPS) Proposed FPGA demodulator is based on the Advanced High speed Design Methodology using the Parallelism techniques. Based on Hard limited Costas Loop development for Carrier and Clock Recovery. Simultaneous Demodulation and Bit-synchronization Continuous programmability of data rates, Modulation Schemes decoding and adaptable base band filtering.

Three axis azimuth-elevation-train (variable tilt axis) axis tracking pedestal for antenna system

IMGEOS facility consists of four 7.5 mtr antenna systems for multi-mission data reception. Out of the 4 Antenna systems, 2 have tilted pedestals and 2 have un-tilted pedestals. Tilted pedestals have the capability to avoid the Zenith /overhead passes and can track the high elevation passes without any difficulty. The limitation/drawback of fixed tilt mechanism is that, if the satellite trajectory is in the opposite direction of tilt direction, then the line of sight at horizon/low elevation gets reduced and cannot avoid the zenith/overhead zone.By providing a programmable tilt to the pedestal up to 7 degree tilt, a distinct advantage of adjustment of Tilt in any direction (unlike fixed tilt) as per the satellite trajectory is achieved and totally eliminates cone of silence/ dead zone of Elevation over Azimuth Mounts. This programmable tilted pedestal is also called as Train axis/3-axis mount (Az, El and Train axis) and is essential for tracking the future missions like Cartosat – 3/3A/3B which will transmit the data in Ka band frequency (25.5 – 27.0 GHz).