搜索结果: 121-135 共查到“工学 wireless”相关记录236条 . 查询时间(0.156 秒)
A LOCATION-TRACKING TESTBED USING VISION-ASSISTED SCHEME FOR WIRELESS SENSOR NETWORKS
Alpha-Beta Filtering Kalman Filtering Location Tracking Normalized Cross Correlation WSN
2014/4/25
This paper presents the performance of an efficient location tracking algorithm based on Alpha-Beta (α-β) filtering with vision-assisted in a wireless sensor network (WSN) environment. With a vision-a...
An O(log n) Distributed Approximation Algorithm for Local Broadcasting in Unstructured Wireless Networks
Local Broadcasting Unstructured Wireless Networks
2012/12/4
The unstructured multi-hop radio network model, with asynchronous wake-up, no collision detection and little knowledge on the network topology, is proposed for capturing the particularly harsh charact...
Energy Efficient Broadcast in Multiradio Multichannel Wireless Networks
Energy Efficient Broadcast Multiradio Multichannel Wireless Networks
2012/12/3
The broadcast is a fundamental operation in computer and communication networks. We study broadcast in multiradio multichannel multi-hop wireless networks. Suppose through configuration, each node is ...
MULTIPLE TARGETS DETECTION AND LOCALIZATION BASED ON BLIND ESTIMATION IN WIRELESS SENSOR NETWORK
Multi-Target Path Fading Bind Estimation Independent Component Analysis
2014/5/8
Observations of sensors are modeled as mixed signals in multiple targets scenario. Each element of mixing matrix represents the power decay of a pair of target and sensor, and each column preserves th...
SERVICE ORIENTED ARCHITECTURE FOR WIRELESS SENSOR NETWORKS IN AGRICULTURE
Syntactic standardization Interoperability Wireless Sensor Networ Sensor Web Enablement, Agriculture
2014/4/28
Rapid advances in Wireless Sensor Network (WSN) for agricultural applications has provided a platform for better decision
making for crop planning and management, particularly in precision agricultu...
This investigation experimentally demonstrates a 40 GHz phase shifter based on a semiconductor laser. The phase shift is achieved by adjusting the bias current and wavelength detuning. The device has ...
Hybrid Access Network Integrated With Wireless Multilevel Vector and Wired Baseband Signals Using Frequency Doubling and No Optical Filtering
EXPERIMENTAL SETUP optical power Wireless Multilevel Vector
2011/11/17
FIBER-TO-THE-x (FTTx) have been widely constructed for high data rate wired services to provide triple-play services including voice, data, and video [1]. On the other hand, radio-over-fiber (RoF) tec...
Exact algorithms to minimize interference in wireless sensor networks
Exact algorithms minimize interference wireless sensor networks
2012/12/4
Finding a low-interference connected topology is a fundamental problem in wireless sensor networks (WSNs). The problem of reducing interference through adjusting the nodes’ transmission radii in a con...
Minimizing Interference for the Highway Model in Wireless Ad-Hoc and Sensor Networks
wireless ad-hoc sensor networks interference minimization topologycontrol combinatorialoptimization dynamicprogramming.
2012/12/4
Finding a low-interference connected topology is one of the fundamental problems in wireless ad-hoc and sensor networks. The receiver-centric interference on a node is the number of other nodes whose ...
Major Coefficients Recovery: a Compressed Data Gathering Scheme for Wireless Sensor Network
Coefficients Data Gathering Wireless Sensor Network
2012/12/4
For large-scale sensor networks deployed for data gathering, energy efficiency is critical. Eliminating the data correlation is a promising technique for energy efficiency. Compressive Data Gathering ...
Wireless energy transfer with the presence of metallic planes
Wireless energy transfer metallic planes
2015/8/10
We numerically demonstrated that efficient wireless energy transfer can be achieved between two high Q resonators in a complex electromagnetic environment. In particular, in the close proximity ...
Distributed MIMO Antenna Architecture for Wireless-over-Fiber Backhaul with Multicarrier Optical Phase Modulation
Coherent communications Phase modulation Radio frequency photonics
2015/5/26
A novel optical phase-modulated wireless-over-fiber backhaul architecture for next generation cellular network is presented and experimentally demonstrated for high capacity wireless multicarrier upli...
Radio over Fiber tunnel for 60 GHz wireless Home Network
Fiber optics optical communications Fiber optics communications
2015/5/26
60GHz radio coverage is extended by using RoF at intermediate frequency with two hops in the air. MMF and low-cost photonics are used. Real-time transmission between two commercial Wireless-HD devices...
20-Gb/s Error-Free Wireless Transmission Using Ultra-Wideband Photonic Transmitter-Mixer Excited with Remote Distributed Optical Pulse Train
Photodiodes Radio frequency photonics
2015/5/26
Photonic transmitter-mixers with ultra-wide O-E/modulation bandwidths excited by remote-distributed pulse trains for 20Gbps error-free wireless transmission is presented. The S/N ratios and output pow...
A Novel Wireless over Fiber Access Architecture Employing Moving Chain Cells and RoF Technique for Broadband Wireless Applications on the Train Environment
Networks ptical communications
2015/5/26
We have demonstrated a hybrid optical/wireless system based on moving chain cells and radio-over-fiber techniques. This scheme can improve power efficiency, cell-edge coverage,system throughput and fl...