IMPLEMENTING A DIGITAL TRACKER FOR MONOPULSE RADAR USING THE TMS320C40 DSP

This project AXIR_B (Digital Tracker) corresponds to a PCB that performs the following main tasks.

- Deviation calculus and coordinates transformations.

- Tracking and smoothing the rectangular (X, Y, Z) coordinates.

- Interfacing with the pedestal and the Radar Manager.

The Digital Tracker operates different algorithms during the three modes of the AXIR. The three modes of the AXIR radar are acquisition process, tentative tracking, and confirmed tracking.

The Digital Tracker communicates through dual access memory with AXIR_A (Doppler processing) and AXIR_C (Radar Manager) projects.

The input data used by the Digital Tracker corresponds to four beams, 16 ranges bins, and three Doppler filters. From this data the Digital Tracker calculates the deviations in elevation, azimuth, and range and transforms them into rectangular errors. Three Alpha-Beta filters are used to smooth the coordinates and to calculate the derivatives (predicted X, Y, Z, dX/dt, dY/dt, dZ/dt).

From this trajectory data, the loops are completed via the reverse matrix conversion calculating the azimuth and elevation voltages to the benefit of the pedestal motors. The predicted range is used to generate the early and late range gates.

The Radar Manager is responsible for updating the Alpha-Beta coefficents.

This project is based on a PCB using one Texas Instruments (TI(TM)) TMS320C40 digital signal processor(DSP).

This document was an entry in the 1995 DSP Solutions Challenge, an annual contest organized by TI to encourage students from around the world to find innovative ways to use DSPs. For more information on the TI DSP Solutions Challenge, see TI's World Wide Web site at www.ti.com.

*DISCLAIMER: This document was part of the DSP Solution Challenge 1995 European Team Papers. It may have been written by someone whose native language is not English. TI assumes no liability for the quality of writing and/or the accuracy of the information contained herein.

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