Global ETD Search
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Showing 1 to 16 of 16 for “"wireless transceivers"”.
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Integrated Filter Antennas for Wireless Transceivers
… on the integration of filters and antennas for wireless transceivers. Filters and antennas are parts of wireless transceivers of all wireless communication systems. Filters and antennas, albeit connected, are separate circuits which take up their own individual space in wireless transceivers. …
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Performance Analysis Of Low-power, Short-range Wireless Transceivers
… (IEEE 802.11), ZigBeeTM etc., in the field of wireless communications, different transceivers have been designed to operate at various frequencies such as 450 MHz, 902-920 MHz, 2.4 GHz, all part of designated ISM band. Though, the wireless systems have become more reliable, compact and easy to …
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An Analog/Mixed Signal FFT Processor for Ultra-Wideband OFDM Wireless Transceivers
… (UWB) systems operate in an increasingly crowded wireless environment at low power levels, the ability to tolerate large blocking signals is critical. The goals of this work are to reduce the disproportionately high power consumption found in UWB OFDM receivers while increasing the receiver …
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Linear Precoding for Downlink Network MIMO Systems
Modern wireless transceivers use multiple transmit and/or receive antennas, higher order modulation and large bandwidth to satisfy high data rate requirements of voice, data and multimedia applications. As wireless systems become more complex, the need to make wireless transceivers more efficient, …
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An energy efficient RF transceiver for wireless microsensor networks
A wireless microsensor network consists of a group of sensor nodes that are deployed remotely and used to relay sensing data to the end-user. Due to their remote deployment, large scale wireless sensor networks require a low-power, energy efficient transceiver that can operate for years on a single …
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Robust implementation of algorithms for distributed generation control of small-footprint power systems
… of low-complexity devices equipped with wireless transceivers that implements the algorithms is described. We conclude by illustrating the efficacy of the algorithms by utilizing the hardware testbed to control the synchronous generators to regulate the electrical frequency in a …
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Adaptive multilevel quadrature amplitude radio implementation in programmable logic
Emerging broadband wireless packet data networks are increasingly employing spectrally efficient modulation methods like Quadrature Amplitude Modulation (QAM) to increase the channel efficiency and maximize data throughput. Unfortunately, the performance of high level QAM modulations in the …
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An all-digital transmitter for pulsed ultra-wideband communication
… to a demand for energy-efficient and low-cost wireless transceivers. These types of applications typically require low effective data rates, thus providing an opportunity to employ simple modulation schemes and aggressive duty-cycling. Due to their inherently duty-cycled nature, pulse-based …
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Efficiency enhancement techniques for RF and millimeter wave power amplifiers
Power amplifiers are the circuit blocks in wireless transceivers that require the largest power budget because of their relatively low efficiencies. RF designers cannot depend solely on the development better semiconductor devices in advanced deeply scaled process technologies to obtain improved …
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High-performance reference frequency generation techniques
… high-frequency clocks in modern wireline/wireless transceivers require high-frequency reference clocks to achieve excellent noise performance. In the first part of this work, we present ways to generate such reference clocks at 4 times the frequency of a standard crystal oscillator (XO) …
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Low-Power RF Front-End Design for Wireless Body Area Networks
Wireless body area networks (WBANs) have tremendous potential to benefit from wireless communication technology and are expected to make sweeping changes in the future human health care and medical fields. While the prospects for WBAN products are high, meeting required device performance with a …
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Communication Strategies for Single-User and Multiuser Slow Fading Channels
Technological progress in the field of wireless communications over the past few years has only been matched by the increasing demand for sophisticated services at lower costs. A significant breakthrough was achieved in the design of efficient wireless communication systems with the advent of the …
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Analysis and Design of Wide Tuning Range Low Phase Noise mm-wave LC-VCOs
<p>The growing demand for higher data rate in wireless transceivers continues to consume available bandwidth and move towards multi-band/multi-channel mm-wave systems to satisfy latest specifications and be compatible with legacy standards. One of the critical components, the LC-voltage controlled …
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Design and Characterization of RFIC Voltage Controlled Oscillators in Silicon Germanium HBT and Submicron MOS Technologies
Advances in wireless technology have recently led to the potential for higher data rates and greater functionality. Wireless home and business networks and 3G and 4G cellular phone systems are promising technologies striving for market acceptance, requiring low-cost, low-power, and compact …
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The Analysis and Design of Phase-tunable Low-Power Low-Phase-Noise I/Q Signal Sources for Analog Phase Calibrated Transceivers
… and large-scale integration of system-on-chip wireless transceivers, the image-reject, zero-IF and low-IF receiver architectures have become the main topologies used in mainstream wireless communication systems. Consequently, signal sources with quadrature phase outputs [quadrature oscillators …
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Digital enhancement techniques for fractional-N frequency synthesizers
… save power at the system-level of wireline and wireless transceivers.