Essays about: "ENERGY EFFICIENCY SPECTRAL EFFICIENCY"

Showing result 21 - 25 of 31 essays containing the words ENERGY EFFICIENCY SPECTRAL EFFICIENCY.

1. 21. Signal processing in massive MIMO systems realized with low complexity hardware

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Sara Gunnarsson; Micaela Bortas; [2017]
   Keywords : massive MIMO; energy efficiency; 5G; low complexity; digital signal processing; supply voltage; Technology and Engineering;

   Abstract : The global mobile data traffic, as well as the energy consumption, for networks is constantly increasing. For this reason, techniques which can provide higher spectral efficiency while being more energy efficient are needed. READ MORE

3. 22. Investigation of phase conjugation for medical imaging

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Author : Ivan Sytcevich; [2017]
   Keywords : Phase conjugation; Ultrasound Optical Tomography; Rare-Earth-Doped Crystals.; Physics and Astronomy;

   Abstract : With the development of extremely precise spectral filters based on spectral hole burning and slow light effects, the idea of their implementation in an Ultrasound Optical Tomography (UOT) medical imaging technique arose. Simulations have shown that the resulting Contrast-to-Noise (CNR) ratio is fairly good at depths up to 5 cm but decreases dramatically when probing deeper in tissue. READ MORE

4. 23. Radio Resource Management Algorithms for D2D Communications With Limited Channel State Information

   University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Author : Peiyue Zhao; [2015]
   Keywords : ;

   Abstract : Network assisted Device-to-Device (D2D) communication has the potential benefits of increasing system capacity, energy efficiency and achievable peak rates while reducing the end-to-end latency. To realize these gains, recent works have proposed power control (PC) and resource allocation (RA) schemes that show near optimal performance in terms of spectral or energy efficiency. READ MORE

5. 24. Spectrum conversion in solar cells industry : Novel model concept and steps towards commercialization

   University essay from Högskolan i Halmstad/Energivetenskap

   Author : Mutaz Alkiswani; [2015]
   Keywords : renewable energy; solar cells; spectrum conversion.;

   Abstract : Solar photovoltaic industry is a hot research field, massive attempts are going on all over the world to increase its productivity in different ways. One of the challenges for solar cells is the light spectrum mismatch losses, which referred to the part of solar spectrum that cannot be utilized to electricity by the conventional cells. READ MORE

6. 25. Pilot Contamination and Mitigation Techniques in Massive MIMO Systems

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Vidit Saxena; [2014]
   Keywords : Multicell Systems; Massive MIMO; Pilot Contamination; LTE; Power Control; Resource Allocation; Channel Estimation; Precoding; Technology and Engineering;

   Abstract : 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