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 30 for “"802.11b"”.
-
Transmit simulation and receive optimizations for 802.11b networks
… encoding through base band modulation for the 802.11b wireless networking standard. This forward transmit chain is coupled with a physical channel simulation that can introduce a number of different channel effects to simulate interference caused in the real world. Packets which the transmit …
-
A Raw processor interface to an 802.11b/g RF front end
… between the Raw microprocessor and a modified 802.11a/b/g wireless access point. Combined with the Raw processor, this interface replaces a custom digital chip in the access point. The interface can be used with the Raw microprocessor to perform communications research, and as a system …
-
A Simulator for analyzing the throughput of IEEE 802.11b Wireless LAN Systems
… have proliferated in the last 5 years. The IEEE 802.11b products have become commonplace both in the residential and business places for untethered Internet access. However the end user experience has often been less satisfactory than what the technology can offer. The degradation in the …
-
A fuzzy logic based approach to quality of service in 802.11b wireless networks
… of Electrical and Electronic Engineers (IEEE) 802.11b. Wireless hotspots and local area networks using equipment working to this standard are now ubiquitous. Regrettably the 802.11b standard has no mechanisms for providing QoS across wireless channels. Users of 802.11b networks cannot rely on …
-
Filtering techniques for mitigating microwave oven interference on 802.11b wireless local area networks
… Particularly strong interferers for the IEEE 802.11b standard are microwave ovens, since both operate at 2.4 GHz. The interference mitigation techniques all exploit the differences between the interference and the signal, since the former is sinusoidal in nature while the latter can be viewed …
-
Throughput Measurements and Empirical Prediction Models for IEEE 802.11b Wireless LAN (WLAN) Installations
… campaign to evaluate the performance of two IEEE 802.11b access points (APs) under ideal, multiuser, and interference scenarios. The data from this measurement campaign was then used to create empirically based throughput prediction models. The resulting models were first developed using RSSI …
-
Reduction in Coexistent WLAN Interference Through Statistical Traffic Management
… bands. Two such protocols are Bluetooth and IEEE 802.11b. Several methods have been presented in the literature for managing interference between these two devices. However, these approaches are generally not practical, since they either require the purchase of specialized hardware or do not …
-
Implementation of a power-saving protocol for ad hoc wireless networks
… with the Linux networking stack using the 802.11b wireless link technology. From this thesis, we conclude that Span can be implemented on an 802.11b network with reasonable performance for most networking applications. Furthermore, our implementation of Span yields a lifetime improvement of …
-
Performance of wireless off-road vehicular networks
… bandwidth limited, or exhibit too much latency. 802.11 standard networks are a low-cost, readily available technology that have the potential of integrating effectively with current off road equipment software and hardware. The main objective of this research was to develop a baseline for the …
-
MedLAN: Compact mobile computing system for wireless information access in emergency hospital wards
… that, it makes use of the existing IEEE 802.11b wireless technology. Initially, this thesis demonstrates that for specific scenarios (such as when using WLANs), DICOM specifications should be adjusted to accommodate for the reduced WLAN bandwidth. Near lossless compression has been used …
-
Design of a Micro Wireless Instrumented Payload for Unmanned Vehicle Testing
… a secure digital card for data storage, and an 802.11b module to provide wireless connectivity. Additionally, the μWIP contains a on-board battery and the circuitry required to charge it. Firmware for the ARM7 processor was written to allow sensor calibration and data transmission, and a user …
-
Design of MAC protocols to support quality of service for multimedia traffic in wireless LANs
Since the introduction of 802.11 MAC protocol standards for wireless local area network (WLAN) in 1999 by the IEEE task force group, WLAN has experienced tremendous growth. This can be observed by the increasing number of “hotspots” in public places such as airports, train stations, shopping …
-
Wireless Intrusion Detection Sytem
… (WIDS) that provides additional security for 802.11b wireless networks. WIDS provides intrusion detection that can react to potential threats and locate an intruder through the use of intelligent access points equipped with rotating directional antennas.
-
Creating a Portable Wireless Display
… The prototype functions under the range of an 802.11b or Bluetooth wireless network. The Software interfacing is done with Virtual Network Computing (VNC). This thesis is a first step towards analyzing and creating head/wrist mounted displays capable of transmitting images from a remote …
-
Throughput Optimization and Transmitter Power Saving (TOTPS) Algorithm and Extended TOTPS (ETOTPS) Algorithm for IEEE 802.11 Links
The IEEE 802.11 wireless local area network (WLAN) standard supports multiple transmission modes. However, the higher mandatory data rate mode does not necessarily yield higher throughput. This research started from the relationship between the link throughput and the channel's carrier-to-noise …
-
Reconfigurable Wideband Circularly Polarized Microstrip Patch Antenna for Wireless Applications
… the suggested design procedure to cover the IEEE 802.11b/g WLAN band. The performance of the fabricated antenna was measured and compared with the simulation results for the reflection coefficient, axial ratio, radiation pattern, and antenna gain. Good agreement is achieved between simulation and …
-
High-throughput routing for multi-hop wireless networks
… well with ETX. Measurements taken from a 29-node 802.11b test-bed show that using ETX improves performance significantly over the widely-used minimum hop-count metric. For long paths the throughput increase is often a factor of two or more, suggesting that ETX will become more useful as networks …
-
A broadband Microwave Transceiver Front-end for an Airborne Software Defined Radio Experiment
… must operate in the GSM-1800 and IEEE 802.11b/g WiFi frequency bands and accommodate beamforming. It consists of a transmitter and dual band receiver. The receiver input is fed by a helical antenna and the outputs are digitized for use in the SDR. The transmitter is fed by a complex …
-
Circuiti Elettronici Integrati per Applicazioni Battery-less IoT e Dispositivi Biomedici Impiantabili
… su silicio del primo trasmettitore WiFi 802.11b a backscattering con consumo inferiore al micro-Watt, alimentato unicamente da una fonte di energia a 2.4 GHz (senza batteria). È presentata anche una prova di concetto per il rilevamento del movimento/posizione basato sulla potenza del …
-
SimPhony : voice group communication
… for distributed workgroups. It uses the 802.11b network to transmit either synchronous or asynchronous voice data depending on the worker's environment or preference. The system allows for one-to-one or one-to-many communication with voice instant messages or synchronous audio. Simphony …
Page 1 of 2