Essays about: "loop antenna"
Showing result 6 - 10 of 17 essays containing the words loop antenna.
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6. PLL for 5G mmWave
University essay from Lunds universitet/Institutionen för elektro- och informationsteknikAbstract : This paper presents research and implementation of a high frequency Integer-N phase-locked loop for digital beamforming in mobile devices. Multiple topologies investigated whereof two were implemented. The transient phase noise of the PLL is -104dB/-95dB @1MHz. The output frequency range is from 8G-10G. READ MORE
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7. Approximate Inference Low-Complexity MIMO Detection
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : In the telecommunications field, the correct detection of a certain signal is of most interest as it improves the robustness of the system. With multiple-input multiple-output (MIMO) antenna systems a new problem arises, the increase in complexity of the detection algorithms with the number of antennas. READ MORE
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8. Design of a 30 GHz PLL for use in Phased Arrays
University essay from Lunds universitet/Institutionen för elektro- och informationsteknikAbstract : This project includes the research and implementation of a high frequency phase-locked loop (30 GHz or more) for beamforming use in a phased antenna array. The phase-locked loop includes a quadrature voltagecontrolled oscillator with a 10% tuning range and 417 degrees of phase control with a 10 degree resolution, a current mode latch in the divide-bytwo configuration operates over the quadrature voltage-controlled oscillator’s tuning range while consuming less than 583 uA of current, Dtype flip flops in a divide-by-8 configuration, a phase-frequency detector, a charge-pump, and a loop filter. READ MORE
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9. Pilot Contamination and Mitigation Techniques in Massive MIMO Systems
University essay from Lunds universitet/Institutionen för elektro- och informationsteknikAbstract : A multi-antenna base station (BS) can spatially multiplex a few terminals over the same bandwidth, a technique known as multi-user, multiple-input multiple-output (MU-MIMO). A new idea in cellular MU-MIMO is the use of a large excess of BS antennas to serve several single-antenna terminals simultaneously. READ MORE
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10. Spatial variation of radio frequency magnetic field exposure from clinical pulse sequences in 1.5T MRI
University essay from Umeå universitet/Institutionen för fysikAbstract : Cell biological exposure studies in magnetic resonance imaging (MRI) environment, where a complex mixture of strong magnetic fields are present, have attracted considerable interest in recent years. The outcome of such studies might depend strongly on the conditions, for example exposure parameters and spatial variations of exposure. READ MORE