Speaker
Description
Summary
Digital Signal Processor (DSP) is actually the main component in the TileCal Read-Out Driver (ROD) System. The DSPs are responsible for data reconstruction in real time at the ATLAS first level trigger rate (100 KHz). The DSP has to compute energy, phase and Quality Factor (QF) for all the channels in less than 10 μs at the ATLAS maximum rate and send the reconstructed data to the second trigger level.
The Optimal Filtering (OF) Algorithm reconstructs the amplitude and phase of a digitized signal by a linear combination of its digitized samples, pedestal subtracted. DSPs executes OF Algorithms in real time.
To reduce data loss due to radiation effects, the TileCal collaboration decided to include data redundancy in the output links of the FrontEnd. This was accomplished using two optical fibres which transmit the same data. For this purpose a new module, called Optical Multiplexer Board (OMB) was conceived. This board would be able to provide, in case of error in one link, the correct data to the ROD input by analyzing the Cyclic Redundancy Codes (CRC) of the data packets on both fibers coming from the FEB.
OMB has Cyclone devices that provide an ideal platform for implementing low-cost digital signal processing (DSP) systems on an FPGA. Cyclone devices present a flexible hardware solution in which we can implement an Optimal Filtering Algorithm.
This work presents an alternative to implement Optimal Filtering Algorithm.
