نتایج جستجو برای: signal burst
تعداد نتایج: 444727 فیلتر نتایج به سال:
In this paper different variations of the so-called “Tune-and-Select” (TAS) switching node for Optical Burst Switching (OBS) are investigated. Both signal degradation and burst losses limit the effective throughput of such optical burst switching nodes. These limitations are analysed for different nodes with four input/output fibres at different bit rates. The impact of amplifier noise figure, ...
Power-amplifier efficiency is a significant issue for the overall efficiency of most wireless system. Therefore, currently there are different kind of Switched mode power amplifiers are developed which are showing very high efficiency also at higher frequencies but all of these amplifiers are subjected to drive with the constant envelope signals. Whereas, for the increasing demand of high data ...
The video performance benefits of burst-by-burst adaptive modulation are studied, employing a higher-order modulation scheme when the channel is favorable, in order to increase the system’s bits per symbol capacity and conversely, invoking a more robust lower order modulation scheme when the channel exhibits inferior channel quality. It is shown that due to the proposed adaptive modem mode swit...
Abstract This paper provides an overview of the current state stripping model for short gamma-ray bursts. After historical joint detection gravitational wave event GW170817 and accompanying burst GRB170817A, relation between bursts neutron star mergers has been reliably confirmed. We show that many properties which turned out to be peculiar in comparison with other bursts, are naturally explain...
We have employed suspension cultured aequorin-transformed tobacco cells to examine the involvement of Ca2+ in signal transduction of the oxidative burst. Use of cultured cells for this purpose was validated by demonstrating that the cells responded to cold shock quantitatively and qualitatively similarly to the intact transgenic plants from which they were derived. Stimulation of the oxidative ...
Abstract The streamed audio video (AV) content for IPTV across mobile WiMAX channel, the different schemes were discussed to reduce the noise, packet loss and latency. The objective of this paper is to verify the effectiveness of forward error correction (FEC) techniques and to suggest the techniques for robustness problems and to analysis the issues either due to AV coding encoding or due to...
a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...
wimax که مبتنی بر استاندارد ieee 802.16 می¬باشد، یک تکنولوژی بی سیم بر اساس روش دسترسی چندگانه ofdma است. ofdma منابع موجود (زمان و فرکانس) را به چندین زیرحامل متعامد در دامنه فرکانس و چندین سمبل مجاور در دامنه زمان تقسیم می کند. مساله تخصیص پهنای باند در ieee 802.16 این است که چگونه بلوک های دوبعدی در محدوده زمان و فرکانس (که burst نامیده می شود) به کاربران تخصیص داده شود. تخصیص منابع برای کار...
This thesis provides a study on 1.25Gb/s burst-mode receiver design. Firstly, the concept of Passive Optical Network (PON) and the challenges associated with the Optical Line Terminal (OLT) receiver design is addressed in Chapter 1. The fundamental of building blocks in OLT receiver module, including the transimpedance amplifier (TIA) and the limiting amplifier (LA), is provided in Chapter 2. B...
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