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.
Results
Showing 1 to 20 of 58 for “"radio communication"”.
-
The Impact of the Simulated Digital Data Radio Communication Induced Interference on Voice Radio Communication
<p>The transition of air/ground communications, from its present analog structure to a new digital communications architecture, will span a 10-year time frame. Testing to date indicates that the potential for interference from the digital system to the analog system would be critical, especially …
-
On the optimal location of transmitters for micro-cellular radio communication system design
… problem encountered in the field of wireless communication systems using mathematical programming techniques. The problem addressed is an indispensable part of micro-cellular radio system design. It involves an optimal location of radio transmitters, given a distribution of receivers and …
-
Design of mobile radio communication system at millimetre-waves and BER measurements for indoor environments
… in indoor mobile channels. A digital mobile radio system and high precision computer controlled positioning system have been designed and implemented to conduct measurements in a long narrow corridor and an empty rectangular room. The correlation properties of Pseudo-Random Binary Sequence …
-
An evaluation of low cost fpga-based software defined radios for education and research
… study is to evaluate a low-cost Software Defined Radio (SDR) platform for educational and research purposes. An evaluation of existing SDR platforms and design techniques was performed, identifying low cost hardware and software suitable for a laboratory environment. The idea behind the project is …
-
Investigating team collaboration in the fire department of New York using transcripts from September 11, 2001
… demonstrated in this response is recorded in the radio transcripts between responding units and the Manhattan Dispatcher. The goal of this thesis is to use these transcripts to provide a real world example to validate the Structural Model of Team Collaboration, sponsored by the Office of Naval …
-
Radio propagation in fire environments.
Radio propagation in the presence of fire is known to be problematic to communications. In this thesis we use both experimental and theoretical approaches to examine and understand radio propagation in fire environments. Propagation is examined for three small scale fires with broadband equipment …
-
AN INVESTIGATION OF SHORT RANGE ELECTROMAGNETIC WAVE COMMUNICATION FOR UNDERWATER ENVIRONMENTAL MONITORING UTILISING A SENSOR NETWORK PLATFORM
Current state of the art water communications systems rely on optical and acoustic propagation. But these have underperformed in many applications. Wireless Sensor Network (WSN) using radio communication underwater is state of the art. The frequency of operation and the antenna are the big …
-
Evaluation of a digital communication device for railroad worker safety
… main purpose of using a smartphone in railroad communications is to eliminate errors due to radio and pronunciation deficiencies. Previous studies analyzed the communication environment of the dispatcher in order to address questions based upon data link becoming a means for sending and …
-
Communication on limited-mobility underwater sensor networks
… challenges; one of the main challenges being communication. In this thesis we look to improve communication in underwater sensor networks. We expand a simulation environment that models node to node communication in an underwater sensor network that utilizes AquaNodes. We address issues with …
-
A digital signal processing solution for multichannel base stations
Radio communication systems of the future will require a large increase in user capacity. To achieve this, cell sizes will reduce and the number of base stations will increase. Current base station architectures use analogue combining techniques which are expensive, voluminous and inflexible. This …
-
Near-field baseband communication system for use in biomedical implants
… the reader to the near-field baseband pulse radio communication for biomedical implants. It details the design and implementation of the complete communication system with a particular emphasis on the antenna structure and waveform coding that is compatible with this particular technology. …
-
Underwater communication via compact mechanical sound generation
Effective communication with underwater remotely operated vehicles (UROV) can be difficult to accomplish. In water, simple radio communication is quickly dissipated at higher frequencies and lower frequencies require a large antenna, which may not be practical in all applications. Light can also be …
-
Design of Power Amplifier Test Signals with a User-Defined Multisine
Cellular radio communication involves wireless transmission and reception of signals at radio frequencies (RF). Base stations house equipment critical to the transmission and reception of signals. Power amplifier (PA) is a crucial element in base station assembly. PAs are expensive, take up space …
-
Rex 2 : design, construction, and operation of an unmanned underwater vehicle
… cost, difficulty in accurate navigation, and communication between the vehicle and operator. The "Rex 2" UUV employs a system design where a submersible is connected to a float at the water's surface by means of a tether. By maintaining a surface expression, high-bandwidth radio communication …
-
Bit error rate simulation enhancement and outage prediction in mobile communication systems
… software designed for simulating digital mobile radio communication systems. Internally generated two-ray Rayleigh fading channel models as well as imported spatially varying complex channel impulse responses can be utilized in simulations. Implementation of receiver timing jitter and timing …
-
Performance evaluation of chirp spread spectrum system and Land Mobile Satellite System by computer simulation
… examines the performance of two satellite radio communication systems by computer simulation. Two simulations were separately performed for a spread spectrum chirp system as an analog communications system, and for the Land Mobile Satellite System (LMSS) channel as a digital communications …
-
Antenna Selection for a Public Safety Cognitive Radio
Ever since the dawn of radio communication systems, the antenna has been the key component in the construction and performance of every wireless system. With the proliferation of new radio systems, a cognitive radio is a radio that has the capability to sense, learn, and autonomously adapt to its …
-
Radio and Optical Techniques for Locating Equatorial Plasma Irregularities
… and scintillation (fading) of trans-ionospheric radio communication and navigation signals are well-known symptoms of depletions. This dissertation describes new techniques to combine optical and radio ionospheric remote sensing data in common formats to leverage observational strengths and …
-
Tracking an underwater target
… both acoustic instrumentation and wireless or radio communication technology, can successfully track the AUV and interface with scientists. An ASV named RoBoat, built at MIT in undergraduate classes using a kayak hull, is vessel that can be controlled remotely. To help RoBoat become fully …
-
IEEE 802.15.4 Implementation on an Embedded Device
Software Defined Radio (SDR) is a growing technology that allows radio communication to become interoperable. SDR can lower the cost for a particular hardware radio to communicate with another radio that uses a different standard. In order to show the capability of SDR, this thesis shows how to …
Page 1 of 3