Orthogonal frequency division multiplexing(OFDM)has recently attracted vast research attention from both academia and industry and has become a part of new emerging standards for broadband wireless access. Synchronization at receiver end represents one of the most challenging issues and plays a major role in physical layer design.This paper presents design and implementation of a Channel estima...

Memristors have been extensively studied for data storage and low-power computation applications. In this study, we show that memristors offer more than simple resistance change. Specifically, the dynamic evolutions of internal state variables allow an oxide-based memristor to exhibit Ca(2+)-like dynamics that natively encode timing information and regulate synaptic weights. Such a device can b...

Phase-locked-loop in radiofrequency and mixed signal integrated circuit experience noise as electromagnetic interference coupled on input and power supply which translates to the timing jitter. Most of PLL noise analysis did not take into account the ageing effect. However device ageing can degrade the physical parameters of transistors and makes noise impact worse. This paper deals with the an...

The latest Research Trend in wireless communication is implementing wireless system on SDR (Software Define Radio), so the SDR implementation of MIMO-OFDM receiver with channel state information is presented in this paper. Here we use Xilinx 13.1 Spartan 3 xc3s400pq208 FPGA device. The simulation results are obtained for 2x2 MIMO-OFDM receiver system in which we have implemented channel estimat...

This paper describes the architecture of an ATM scheduler that performs cell spacing and respects additional time constraints. The scalable timing mechanism allows for real-time execution even in presence of many ATM virtual channel connections. The algorithm is suited as reference for special purpose implementations and the core idea can be adapted for scheduling problems in IP networks. In pa...

A new type of apparatus for the production of single bubbles of adjustable size is presented. A single bubble is generated by injecting a short burst of gas into a liquid channel flow. The radius of the bubble can be varied continuously from 300 mm up to a 3 mm by adjusting the timing of a valve injecting the gas. The device works also in liquids with variable pressure and can be microcomputer ...

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By inducing two-photon absorption within the active layer of a 28nm test chip, we demonstrate nonlinear laser-assisted device alteration and single-event upsets by temporarily perturbing the timing characteristics of sensitive transistors. Individual qualitative and quantitative evaluations are presented for both techniques, with lateral resolutions demonstrated with sub-100nm performance. A si...

The efficient parallel implementation of a 3-D Monte Carlo device simulator is described. The parallel algorithm was implemented on a 64 node nCUBE multicomputer and its accuracy was validated by generating the static characteristics of a MESFET. Timing measurements were made to study the variation of the speedup of the parallel program as a function of the number of processors. We identify the...

Over the last five years, microelectromechanical systems (MEMS) solutions have steadily eroded the 100-year-old monopoly held by quartz crystal solutions for frequency control and timing products. MEMS technologies, originally designed around the promise of smaller form factors, have enabled significant additional advantages related to lead time, supply stability, product reliability, device si...