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 10 of 10 for “"Transmitting antennas"”.
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High rate space time code with linear decoding complexity for multiple transmitting antennas
… achieve a full rate code when the number of transmitting antennas is larger than two. Quasi OSTBC are codes with full rate but with the penalty of more complex decoding, and in general does not achieve full diversity. In this work, new techniques for OSTBC transmission / decoding are …
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Modeling and calculation of the specific absorption rate for multi-antenna mobile devices
… of which require the integration of multiple transmitting/receiving antennas into the limited space of the device. Since each radio antenna exposes the user to some level of electromagnetic radiation, if several radios are operating concurrently, the total exposure could be cumulative, which …
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Design and Implementation of Radio Frequency Power Feeding Networks for Antenna Array Applications: Simulation and Measurements of Multiport, Equal and Unequal, Fixed and Reconfigurable Radio Frequency Power Feeding Networks for Narrow and Ultra-Wideband Applications
… element caused by interference from in-site transmitting antennas. This study investigated fixed power dividers, multi-output power dividers and reconfigurable power dividers. The measurements validated by the simulation results and applications proved the designed power dividers could be …
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MIMO channel model
… signal power is divided equally over the transmitting antennas. Water-filling assumes perfect knowledge about the channel which allows the total power to be divided in the most efficient way over different transmitters. Therefore, the results show the equal power has less capacity than the …
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Advanced classification of OFDM and MIMO signals with enhanced second order cyclostationarity detection
… problem, wherein we estimate the number of transmitting antennas. Here the second order cyclostationarity test has been applied in distinguishing STC from BLAST modulation.
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Adaptive Arrays and Diversity Antenna Configurations for Handheld Wireless Communication Terminals
… indicate that signals received by the antennas in two-element handheld antenna arrays with spacing of 0.15 wavelength or greater can be combined to provide 7-9 dB diversity gain against fading at the 99% reliability level in non line-of-sight multipath channels. Thus, peer-to-peer …
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Focal waveform of a prolate-spheroidal impulse radiating antenna (IRA)
Impulse Radiating Antennas (IRAs) are designed to radiate very fast pulses in a narrow beam with low dispersion and high field amplitude. For this reason they have been used in a variety of applications. IRAs have been developed for the transient far-field region using paraboloidal reflectors. …
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Different Multiple Input Multiple Output Systems
The use of multiple antennas at the transmitter as well as at the receiver can greatly improve the capacity of a wireless link when operating in a rich scattering environment. In such an arrangement all transmitting antennas radiate in the same frequency band so the overall spectral efciency …
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Target localization in passive and active systems : performance bonds
… by SNR, by the product between the number of transmitting antennas and the number of receiving antennas from the radar system, and by all the ambiguity functions and the cross-ambiguity functions corresponding to all pairs transmitter-target-receiver. Similar to the coherent localization, the …
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Enhancing Signal Coverage for UHF RFID Systems
… the proposed model considers practical antennas’ irregular beam patterns, polarisations, arbitrary orientations and variable AR. The proposed model is verified against commercial MoM simulation software and has shown comparable accuracy but orders of magnitude less time and memory …