Global ETD Search
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Showing 1 to 19 of 19 for “"Smart Antenna"”.
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Wireless Network Physical Layer Security with Smart Antenna
Smart antenna technique has emerged as one of the leading technologies for enhancing the quality of service in wireless networks. Because of its ability to concentrate transmit power in desired directions, it has been widely adopted by academia and industry to achieve better coverage, improved …
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Resource Management with Smart Antenna in CDMA Systems
… in addition to voice applications. The Smart antenna technique is one of the leading technologies that helps to meet the requirement by such services to radio network capacity. Resource management schemes such as power control, handoff and channel reservation/assignment are also …
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A base station smart antenna system for CDMA cellular
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver
… radio wave propagation measurement and modeling, smart antenna arrays, and software-defined radio development. A four-channel, wideband, software-defined receiver was developed to serve as a test bed for wideband measurements and antenna array experiments. This receiver was used to perform vector …
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Latency Study and System Design Guidelines for Cooperative LTE-DSRC Vehicle-to-Everything (V2X) Communications including Smart Antenna
… improving performance is using a better suitable antenna for physical communication. The mobility of vehicles results in a highly variable propagation channel that complicates communication. Use of a smart, steerable antenna can be one solution. The most commonly used antennas for vehicular …
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Feasibility of Smart Antennas for the Small Wireless Terminals
Smart antenna is a potential performance enhancement tool in a communications link that can be used at either end (transmitter or receiver) of the link in the form of beamforming or diversity operation. While receive smart antenna techniques and operations have matured over the years, transmit …
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Performance Comparison Between Music And Esprit Algorithms For Direction Estimation Of Arrival Signals
… of Arrival (DOA) of incoming signals to the smart antenna. The comparison of these two algorithms was done on the basis of parameters like number of array elements, number of incoming signals, angle difference between the incoming signals, number of the samples taken of signal, processing …
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Smart Antennas & Power Management in Wireless Networks
… In this thesis work I propose to the use smart antenna technology and a power management scheme in the wireless ad-hoc networks to increase the network capacity in terms of throughput, number of simultaneous communication and to lower the average transmit power and consequently co-channel …
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Smart Antennas at Handsets for the 3G Wideband CDMA Systems and Adaptive Low-Power Rake Combining Schemes
Smart antenna technology is a promising means to overcome signal impairments in wireless personal communications. When spatial signal processing achieved through smart antennas is combined with temporal signal processing, the space-time processing can mitigate interference and multipath to yield …
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Optimum combining of handset diversity antennas
… link sensitivity improvements due to dual-antenna systems with smart-antenna combining algorithms were determined. The performance of a mobile handset with a top-mounted monopole and back-mounted internal monopole was determined in the field. Handset field tests were conducted both for the …
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Application of smart antennas to wideband code division multiple access : the uplink performance
Adaptive antenna arrays have recently been introduced to cope with the high capacity required by the 3rd generation (3G) wireless communications systems. As adaptive antenna arrays focus narrow high gain beams towards the desired user and nulls towards interferers, both coverage and capacity of the …
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… signal rates for wireless communication systems. Smart antennas are the promising technology for improving the wireless communication systems performance. Smart antennas are system that consist of antenna arrays capable of adaptively adjusting the beam pattern, thereby enhancing the desired …
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A correlation-based method for direction finding of multipath signals in frequency hopping systems
… sonar and wireless communication systems. In smart antenna systems, the direction of users is an important factor to increase the capacity, and an antenna array is usually used at the base station to estimate and track the direc-tion of users. Conventional direction finding methods solve the …
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Smart Base Station Antenna Performance for Several Scenarios - an Experimental and Modeling Investigation
Smart antenna systems are employed to overcome multipath fading, extend range, and increase capacity by using diversity or beamforming techniques in wireless communication systems. Understanding of the smart base antenna performance mechanisms for various environments is important to design cost …
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On the Capacity Modelling in 3G Mobile Wireless Communications Systems
… capacity increase with the use of directional smart antennas to reduce the interference and therefore gain capacity increase. These are typically complex systems. One type that is simple enough yet beneficial in gaining capacity and coverage improvements in the WCDMA environment is called the …
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Refraction interference elimination employing smart arrays at VHF
… robust solution based on an innovative receiving antenna design. The antenna is a receiver’s component that collects electromagnetic waves from various directions. The rationale behind focusing on a circular array topology is that its tuning ensures that the receiver processes the desired signal …
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Improving the Performance of Wireless Systems via Selective Interference Nulling and Adaptive Medium Access Control Design
… wireless systems requires the confluence of smart communication methods, network protocols and ongoing advances in fabrication technologies, in order to bring smaller form factor mobile handsets to market. On par with these trends, this thesis focuses on two main areas, namely, Multiple …
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Space Time Processing for Third Generation CDMA Systems
… than the number of elements of a practical antenna array, we can not perform explicit null-steering. As a result the advantage of beamforming is partially lost. In this scenario it is better to attain diversity gain at the cost of spatial aliasing. We demonstrate this with the aid of …