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 13 of 13 for “"null steering"”.
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The location-estimating, null-steering (LENS) algorithm for adaptive microphone-array processing
… develops and evaluates the Location-Estimating, Null-Steering (LENS) algorithm for adaptive array beamforming in the case of a. known target location. Such beamformers are useful in spatial-filtering applications that enhance a desired target source while attenuating non-target, jammer sources in …
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Investigating the role of antenna parameters in reducing interference
… The pattern changing capabilities of a null steering antenna are studied from the perspective of reducing interference in an indoor environment. For this, a reconfigurable null steering antenna was simulated and fabricated. The field distribution from this antenna was simulated in a two …
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Analytical Framework for the Performance Analysis of Multiple Antenna Systems
… array processing (diversity, beamforming, null steering, and spatial multiplexing) to enhance the received signal quality and the capacity of wireless communications systems. However, in order to properly exploit the characteristics of different array processing techniques, understanding …
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Null Depth Trade Off for Output Power Reduction in a Downlink Adaptive Antenna Array
… downlink beamforming. This algorithm steers the nulls towards interferers and the main beam towards the desired user provided the angles of arrival of these signals are known to the basestation. However, downlink adaptive arrays use additional power when they are required to include null steering …
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Design and analysis of pattern null reconfigurable antennas
… the design, analysis, and measurement of pattern null reconfigurable antennas (NRAs). Unlike conventional pattern reconfigurable antennas, NRAs possess the ability to steer their pattern nulls, yielding interference rejection capabilities. While various NRAs exist, the current state of the art has …
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AN UNBIASED SOURCE LOCATION ALGORITHM AND PERFORMANCE SURFACE OF ZERO TRACKING ALGORITHMS
… conventional methods such as the LMS and biased null steering algorithms. In addition, a study on the stationary points and transient behaviour of using zero tracking based techniques in a power inversion array is presented. As a function of complex response zeros, the output power performance …
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… thereby enhancing the desired signals (beam steering) and suppressing the interference signals (null steering), which is also known as Space Division Multiple Access (SDMA). SDMA systems allow significant improvement in the area of capacity, signal bandwidth, signal-to-interference ratio, and …
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Antenna element pattern reconfigurability in adaptive arrays
… that designers should focus on an element’s null steering capability rather than beam tilting capacity.
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Smart Antennas & Power Management in Wireless Networks
… (CCI) out of a total of NI active interferers by null steering.
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Hybrid classical-quantum optimization algorithms in electromagnetic applications
… RIS configuration, antenna beamforming and null steering for multi-user links and wireless power transfer, and planar or conformal array synthesis under quantized amplitude and phase constraints—is reformulated as Ising Hamiltonians. On the algorithmic side, the work investigates both …
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Power efficient Transmit/Receive (T/R) Elements for Integrated mm-Wave Phased Arrays
… in such application for their beam forming and null steering capabilities, resulting in high directivity and improved SNR. But growing DC power consumption (Pdiss) in such large scale arrays has become an on-going concern along with noise, linearity and phase resolution trade-offs in current …
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Space Time Processing for Third Generation CDMA Systems
… 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 simulation. Orthogonal Frequency Division …
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Spectrum Sharing between Radar and Communication Systems
… accomplished by projecting the radar signal onto null space of the wireless channel between radar and communication system. In order to understand the effects of the proposed sharing mechanism -- in urban, sub-urban, and littoral areas -- new channel models, specifically, two- and …