Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 304 for “"radios"”.
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Social Intelligence for Cognitive Radios
… coordination information among cognitive radios inspired by natural societies. This communication method connects the radios within a network in a way that allows the network to learn in a distributed holistic manner. The behavior-based approach to developing multi-agent systems from the …
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Performance Evaluation of Cognitive Radios
… generalizes the performance function across many radios and applications, with the additional cost of complicating the domain. Thus the presented evaluation system organizes the domain information into sets. These sets are divided into two categories, one capturing necessary information that is …
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Agile Testing Methods for IC Radios
… of the hardware requirements for testing IC radios and the software developed to automate test development and control testing procedures. The main components developed for this project are the Chip Communications and Control Module and the Phase-Locked Loop controller. Respectively, these …
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Design of Low Power Integrated Radios
… IEEE 802.15.6 standard are presented. Low power radios are in increasing demand with the advent of an era of the Wireless Body Area Networks and Internet of Things. The performance of the proposed techniques has been verified by fabricating them in two standard CMOS processes: TSMC's 65nm and …
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Policy Reasoning for Spectrum Agile Radios
… Spectrum Access (DSA) wherein intelligent radios can realize opportunistic usage of frequency bands by identifying the under-utilized spectrum and reasoning about it. Implementing such a flexible scheme requires changes in the current static spectrum management approach. As a result, …
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Enabling Cognitive Radios through Radio Environment Maps
In recent years, cognitive radios and cognitive wireless networks have been introduced as a new paradigm for enabling much higher spectrum utilization, providing more reliable and personal radio services, reducing harmful interference, and facilitating the interoperability or convergence of …
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Analogue self-interference cancellation in full-duplex radios
… of the receiver chain in full-duplex (FD) radios. This is done by cancelling the self-interference (SI) signal before it enters the receiver chain. AASIC techniques are usually implemented together with passive and active digital self-interference cancellation (SIC) techniques. In this …
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Analogue self-interference cancellation in full-duplex radios
… of the receiver chain in full-duplex (FD) radios. This is done by cancelling the self-interference (SI) signal before it enters the receiver chain. AASIC techniques are usually implemented together with passive and active digital self-interference cancellation (SIC) techniques. In this …
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Resource allocation in realistic wireless cognitive radios networks
… This is typically done by using cognitive radios to sense the presence of primary users and tuning to unused spectrum bands to boost efficiency. Expectedly, resource allocation is a very crucial concern in such settings, i.e., power and rate control, and various studies have looked at this …
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The Effects of Performance Appraisal System on Employees’ Performance in Tanzanian Community Radios: A Case of Selected Radios in Dar es Salaam
… on employees’ performance in the community radios. It specifically explores the employees’ awareness on appraisal system, knowledge of the appraisal system and performance appraisal management that leads to effective employees’ performance in community radios. This study was descriptive in …
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Spectrum sensing, spectrum monitoring, and security in cognitive radios
Spectrum sensing is a key function of cognitive radios and is used to determine whether a primary user is present in the channel or not. In this dissertation, we formulate and solve the generalized likelihood ratio test (GLRT) for spectrum sensing when both primary user transmitter and the …
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Exploiting Cyclostationarity for Radio Environmental Awareness in Cognitive Radios
The tremendous ongoing growth of wireless digital communications has raised spectrum shortage and security issues. In particular, the need for new spectrum is the main obstacle in continuing this growth. Recent studies on radio spectrum usage have shown that pre-allocation of spectrum bands to …
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Design Space Decomposition for Cognitive and Software Defined Radios
Software Defined Radios (SDRs) lend themselves to flexibility and extensibility because they<br />depend on software to implement radio functionality. Cognitive Engines (CEs) introduce<br />intelligence to radio by monitoring radio performance through a set of meters and configuring<br />the …
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Automatic Modulation Classication and Blind Equalization for Cognitive Radios
Cognitive Radio (CR) is an emerging wireless communications technology that addresses the inefficiency of current radio spectrum usage. CR also supports the evolution of existing wireless applications and the development of new civilian and military applications. In military and public safety …
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Continuous-Time Delta-Sigma Modulators for Ultra-Low-Power Radios
The modern small devices of today require cheap low power radio frequency (RF) transceivers that can provide reliable connectivity at all times. In an RF transceiver, the analog-to-digital converter (ADC) is one of the most important parts and it is also one of the main power consumers. There are …
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Pilot patterns and power loading in NC-OFDM cognitive radios
The implementation of cognitive radios is widely proposed through the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation. In the special case of cognitive radios however, the OFDM modulation scheme cannot simply be implemented without modification due to the huge change in the …
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Making Radios with GReasy: GNU Radio With FPGAs Made Easy
… Zynq FPGA architecture, the domain of deployable radios by GNU Radio can be broadened. Xilinx Zynq, integrates the FPGA fabric and CPU onto a single chip, which eliminates the need for a controlling host computer; thus, providing a single, portable, low-power, embedded platform. This thesis …
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Diode Predistortion Linearization for Power Amplifier RFICs in Digital Radios
… particularly for PA RFICs in digital radios. Background discussion on common linearization techniques available to the PA designer is presented. In addition, a discussion of traditional and modern methods of nonlinearity characterization is presented, illustrating the nonlinear PA …
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