Investigating Low-complexity Architectural Issues under UBSS

Our Project aim is to develop a real time chip to process the sensor signals and separating the source signals, which is used in Health care like Autism. Autism is a disease which aects the child mental behavior. So If we analyze the signals form the brain so we can observe the how eectively the disease is cured. So to analyze the Autism we need EEG signals from almost 128 Leads from the scalp of child, which is dicult to do so. Thus we have to reduce the number of Leads used and at the same time we should get the all information as in the case of 128-Leads. Thus solving our problem is to solve Underdetermined Blind Source Separation (UBSS). And in some other cases we may have only one mixture signal (M=1), which is extreme case of UBSS, from which we have to extract the unknown sources, which is called Single channel Independent Component Analysis also called SCICA. In SCICA if we have N source signals then it is called ND-SCICA. In real time UBSS or SCICA problem we require a Digital chip which will separate the sources in real time case. So we require a chip which is High speed so that it will be suitable for real time applications and also it should be Recongurable so that it can work for dierent type of applications where the frame length of signals vary. So rst we investigated the architectural issues of Recongurable Discrete Hilbert Transform for UBSS where M is greater than one. Thus we proposed a high-speed and recongurable Discrete Hilbert Transform architecture design methodology targeting the real-time applications including Cyber-Physical systems, Internet of Things or Remote Health-Monitoring where the same chip-set needs to be used for various pur- poses under real-time scenario. By using this architecture we are able to get Discrete Hilbert Transform for any given M-point by re-using N-point Discrete Hilbert Trans- form as a kernel. Here N and M are multiple of 4 and N respectively. Subsequently we provide the architecture design details and compare the proposed architecture with the conventional state-of-the-art architecture. Thorough theoretical analysis and ex- vi perimental comparison results show that the proposed design is twice as fast and recongurability is also achieved simultaneously. After DHT, we proposed a new algorithm for ND-FastICA which is used for ex- treme case of UBSS where the number of mixture/sensor signals are only one. In this algorithm we used CORDIC based ND-FastICA which is recongurable so that the same chip can be used for dierent dimensioned FastICA

Discrete Wavelet Transforms

The discrete wavelet transform (DWT) algorithms have a firm position in processing of signals in several areas of research and industry. As DWT provides both octave-scale frequency and spatial timing of the analyzed signal, it is constantly used to solve and treat more and more advanced problems. The present book: Discrete Wavelet Transforms: Algorithms and Applications reviews the recent progress in discrete wavelet transform algorithms and applications. The book covers a wide range of methods (e.g. lifting, shift invariance, multi-scale analysis) for constructing DWTs. The book chapters are organized into four major parts. Part I describes the progress in hardware implementations of the DWT algorithms. Applications include multitone modulation for ADSL and equalization techniques, a scalable architecture for FPGA-implementation, lifting based algorithm for VLSI implementation, comparison between DWT and FFT based OFDM and modified SPIHT codec. Part II addresses image processing algorithms such as multiresolution approach for edge detection, low bit rate image compression, low complexity implementation of CQF wavelets and compression of multi-component images. Part III focuses watermaking DWT algorithms. Finally, Part IV describes shift invariant DWTs, DC lossless property, DWT based analysis and estimation of colored noise and an application of the wavelet Galerkin method. The chapters of the present book consist of both tutorial and highly advanced material. Therefore, the book is intended to be a reference text for graduate students and researchers to obtain state-of-the-art knowledge on specific applications

Real-Time Beamforming Using High-Speed FPGAs at the Allen Telescope Array

The Allen Telescope Array (ATA) at the Hat Creek Radio Observatory (HCRO) is a wide‐field panchromatic radio telescope currently consisting of 42 offset‐Gregorian antennas each with a 6 m aperture, with plans to expand the array to 350 antennas. Through unique back‐end hardware, the ATA performs real‐time wideband beamforming with independent subarray capabilities and customizable beam shaping. The beamformers enable science observations requiring the full gain of the array, time domain (nonintegrated) output, and interference excision or orthogonal beamsets. In this paper we report on the design of this beamformer, including architecture and experimental results. Furthermore, we address some practical considerations in large‐N wideband beamformers implemented on field programmable gate array platforms, including device utilization, methods of calibration and control, and interchip synchronization

Benchmarking integrated photonic architectures

Photonic platforms represent a promising technology for the realization of several quantum communication protocols and for experiments of quantum simulation. Moreover, large-scale integrated interferometers have recently gained a relevant role for restricted models of quantum computing, specifically with Boson Sampling devices. Indeed, various linear optical schemes have been proposed for the implementation of unitary transformations, each one suitable for a specific task. Notwithstanding, so far a comprehensive analysis of the state of the art under broader and realistic conditions is still lacking. In the present work we address this gap, providing in a unified framework a quantitative comparison of the three main photonic architectures, namely the ones with triangular and square designs and the so-called fast transformations. All layouts have been analyzed in presence of losses and imperfect control over the reflectivities and phases of the inner structure. Our results represent a further step ahead towards the implementation of quantum information protocols on large-scale integrated photonic devices.Comment: 10 pages, 6 figures + 2 pages Supplementary Informatio

10281 Abstracts Collection -- Dynamically Reconfigurable Architectures

From 11.07.10 to 16.07.10, Dagstuhl Seminar 10281 ``Dynamically Reconfigurable Architectures \u27\u27 was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

Measurements, Models, Systems and Design

531 s.