Most modern field-programmable gate arrays (FPGAs) employ a look-up table (LUT) as their basic logic cell. Although a k-input LUT can implement any k-input logic, its functionality relies on a large amount of configur...
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Increasing chip sizes and better programming tools have made it possible to increase the boundaries of application acceleration with FPGAs. Two applications, localization microscopy and electron tomography, are presen...
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Many network services including intrusion detection and recommendation provide their services by analyzing information acquired from network transactions. A careful analysis of these data can reveal valuable informati...
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Optical flow estimation of image sequences is one of the key elements for motion detection. However, processing the optical flow in real-time is still an open task due to its computationally expensive nature. In this ...
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We present the new approach to a filtering of radio frequency interferences (RFI) in the Auger Engineering Radio Array (AERA) which study the electromagnetic part of the Extensive Air Showers. the radio stations can o...
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ISBN:
(纸本)9781479999194
We present the new approach to a filtering of radio frequency interferences (RFI) in the Auger Engineering Radio Array (AERA) which study the electromagnetic part of the Extensive Air Showers. the radio stations can observe radio signals caused by coherent emissions due to geomagnetic radiation and charge excess processes. AERA observes frequency band from 30 to 80 MHz. this range is highly contaminated by human-made RFI. In order to improve the signal to noise ratio RFI filters are used in AERA to suppress this contamination. the filter has been already tested in the real AERA radio stations on Argentinean pampas with a very successful results. the linear equations were solved either in the virtual soft-core NIOS® processor (implemented in the FPGA chip as a net of logic elements) or in the external Voipac PXA270M ARM processor. the NIOS®R processor is relatively slow (50 MHz internal clock), calculations performed in an external processor consume a significant amount of time for data exchange between the FPGA and the processor. Test showed a very good efficiency of the RFI suppression for stationary (long-term) contaminations. However, we observed a short-time contaminations, which could not be suppressed either by the IIR-notch filter or by the FIR filter based on the linear predictions. For the LP FIR filter the refreshment time of the filter coefficients was to long and filter did not keep up withthe changes of a contamination structure, mainly due to a long calculation time in a slow processors. We propose to use the Cyclone®R V SE chip with embedded micro-controller operating with 925 MHz internal clock to significantly reduce a refreshment time of the FIR coefficients. the lab results are promising.
In many Digital Signal Processing (DSP) modules, increasing the number of pipelining stages to achieve higher throughput may break the module functionality if a feedback-loop exists in the algorithm. this paper addres...
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Industrial applications often require processing data with large dynamic ranges at low sample rates. As algorithms become more complex, handling the data range of variables required for fixed-point implementations bec...
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Forward Error Correction (FEC) consumes excessive computation in a Software Defined Radio (SDR) system. In this work, a high-throughput flexible FEC processor is proposed for the decoding acceleration. the FEC process...
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Heterogeneous Multiprocessor System-on-Chip (Ht-MPSoC) architectures represent a promising approach as they allow a higher performance/energy consumption trade-off. In such systems, the processor instruction set is en...
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We have developed the first FPGA-based digital physical unclonable function (PUF) by leveraging the reconfigurability of an FPGA and introducing a new way of using the standard analog delay PUF. the key observation is...
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