Application-specific processors offer an attractive option in the design of embedded systems by providing high performance for a specific application domain. In this work, we describe the use of a reconfigurable processor core based on an RISC architecture as starting point for application-specific processor design. By using a common base instruction set, development cost can be reduced and des...

In this paper, we propose an operator model to detect and identify causes of failure in an emergency, based on which an alarm system in a process can be evaluated and improved. The operator model is a human processor model that includes a perceptual processor, short-term and long-term memories, a cognitive processor, and a motor processor. Knowledge bases for variable information, failure-sympt...

In this paper, a design of CELL band dual polarized base station antenna having air dielectric substrates has been proposed. The study of dual polarized base station antenna and their radiation properties including return loss, isolation, beam width, directivity, and radiation patterns for a single element are discussed. The antenna has a relative bandwidth of 31.7% (VSWR<1.4) with return loss ...

We propose a new approach to solving the spectrum scarcity problem, called spectrum access scheduling (SAS), which allows heterogeneous wireless systems to share the same spectrum band using protocol engineering methods. SAS treats the collection of wireless systems as an ecosystem, and optimizes the system performance by collaborative designs. The key architectural component in realizing SAS i...

An optimum OTA topology is done in order to optimize MOS transistor sizing.Also, the design of folded cascode OTA, which works for frequencies that lead to a base band circuit design for RF application, is based on transistor sizing methodology. Simulation results are performed using SPICE software and BSIM3V3 model for CMOS 0.18μm process, show that the designed folded cascode OTA has a 52dB D...

Given a truncated portion of a band-limited image with known x and y bandwidths, the extrapolation problem is to determine the signal over all x and y. An iterative extrapolation algorithm, recently proposed by Gerchberg, requires only the repeated operations of Fourier transformation and truncation. A coherent optical processor is presented that implements Gerchberg's iterative extrapolation a...

This paper describes a novel structure for a hardwired fast Fourier transform (FFT) signal processor that promises to permit digital spectrum analysis to achieve throughput rates consistent with extremely wide-band radars. The technique is based on the use of serial storage for data and intermediate results and multiple arithmetic units each of which carries out a sparse Fourier transform. Deta...

In this paper a portable automatic digital modulation scanner is described. This novel instrument has been designed including a pre-processor, able to divide the spectrum in sub-bands and to detect the incoming signals in each band, and a classifier, able in processing the detected signals and estimating their modulation types. The new instrument has been evaluated by several experimental tests...

This contribution presents a fixed point implementation for acoustical active noise control in hearing defenders. The well known filtered-x least mean squares structure is conformed to fixed point arithmetic and evaluated in real time. The measured performance of the implementation is 20dB to 30dB attenuation of broad band noise and ca 60dB for sinusoidal interference. The implementation uses a...