The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this work, we propose a novel adaptive control on digital Doherty Power Amplifier (DPA) for efficiency and gain enhancement. Unlike traditional DPA design, we propose Simultaneously Perturbated Stochastic Approximation (SPSA) optimization algorithm by considering phase difference, power distribution and gate voltage parameters of main and peak amplifiers in order to achieve optimal performance...
This paper describes a 960×960 Frame Store Fast Charge-Coupled Device (CCD) x-ray detector being used for x-ray photon correlation spectroscopy (XPCS) at the Advanced Photon Source (APS) on the 8-ID-I beam line. The detector is typically operated in either the 960 × 960 pixel mode at 100 frames per second (fps) or in the 960×90 pixel mode at 1000 fps. The vacuum subsystems consist of a top board with...
We describe a software library, called MPIFCCD, based on the Message Passing Interface (MPI) for real-time parallel computing on data continuously streamed from the Frame Store Fast Charge-Coupled Device (FSFCCD) Detector located at the Advanced Photon Source (APS) at Argonne National Laboratory. The FSFCCD is used to collect data for X-ray Photon Correlation Spectroscopy (XPCS) experiments at Sector...
High density oligonucleotide array (microarray) from Affymetrix has been widely used for the measurements of gene expressions. Currently, public data repositories, such as Gene Expression Omnibus (GEO) of the National Center for Biotechnology Information (NCBI), have accumulated large amounts of microarray data. Efficient integrative analysis of those microarray data will provide significant knowledge...
In this paper, an embedded hardware and software system design and implementation for QR Decomposition Recursive Least Square (QRD-RLS) algorithm using Givens Rotation are presented. Furthermore, hardware and software design optimization are introduced to the Givens Rotation-based method. The computation performance is compared for hardware implementation running on Xilinx Virtex-5 FPGA, and software...
In this paper, we introduce a wireless body sensor network (BSN) system architecture with sensor data collection, signal processing, analysis and transmission capabilities. These capabilities are established on an intelligent Personal Communication Node (iPCN) consisting of an FPGA board and/or an Android smartphone with wireless connections to sensor nodes and a central server. We demonstrate signal...
In this paper, we present a high performance adaptive FIR filter hardware architecture. In particular, the RLS (Recursive Least Square) algorithm for adaptive signal processing is explored based on QR decomposition, which is accomplished by using the Givens Rotation algorithm. The Givens Rotation algorithm is implemented using a systolic array and LUT-based Newton's method. This architecture is suitable...
In this paper, an improved fixed-point hardware design of QR decomposition, specifically optimized for Xilinx FPGAs is introduced. A Givens Rotation algorithm is implemented by using a folded systolic array and the CORDIC algorithm, making this very suitable for high-speed FPGAs or ASIC designs. We improve the internal cell structure so that the system can run at 246MHz with nearly 24M updates per...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.