Essays about: "Channel aging"

Showing result 1 - 5 of 6 essays containing the words Channel aging.

1. 1. Performance Analysis of the Uplink of Multi-antenna Systems Operating in Aging Channels

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Prasetyo Putranto; [2023]
   Keywords : Channel aging; Pilot spacing; Rayleigh; Rician; Spectral efficiency; Uncrewed aerial vehicles; Kanalåldring; Pilotavstånd; Rayleigh; Rician; Spectral effektivitet; Obemannade flygfordon;

   Abstract : In wireless communications, employing pilot symbols enables to estimate the state of the wireless channel at the expense of decreasing the number of symbols available for transmitting data. Addressing this trade-off is particularly challenging when the channel changes rapidly over time, since channel estimates become obsolete over short transmission periods. READ MORE

3. 2. Channel Estimation and Power Control Algorithms in the Presence of Channel Aging

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Yan Bixing; [2023]
   Keywords : Fading channel; auto-regressive model; power allocation; uncrewed aerial vehicle networks; Fading kanal; auto-regressiv modell; krafttilldelning; obemannade flygfordonsnätverk;

   Abstract : Power allocation algorithms that determine how much power should be allocated to pilot and data symbols play an important role in addressing the trade-off between accurate channel estimation and high high spectral efficiency for data symbols in the presence of time-varying fading channels. Dealing with this trade-off is highly non-trivial when the channel changes or ages rapidly in time. READ MORE

4. 3. Battery Capacity Prediction Using Deep Learning : Estimating battery capacity using cycling data and deep learning methods

   University essay from Mälardalens universitet/Framtidens energi

   Author : Josefin Rojas Vazquez; [2023]
   Keywords : Battery management system; Lithium-ion batteries; battery degradation mechanisms; battery cycle life; Electrical impedance spectroscopy; Capacity estimation; Incremental capacity analysis; Deep learning models; Equivalent circuit model; Long short-term memory; Feedforward neural network; Conventional neural network; multi-channel data; Incremental capacity analysis;

   Abstract : The growing urgency of climate change has led to growth in the electrification technology field, where batteries have emerged as an essential role in the renewable energy transition, supporting the implementation of environmentally friendly technologies such as smart grids, energy storage systems, and electric vehicles. Battery cell degradation is a common occurrence indicating battery usage. READ MORE

5. 4. Optimizing Control Algorithm for Indirect Liquid ThermalManagement of Batteries : A Study Executed at Northvolt

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Mantas Petrosius; [2021]
   Keywords : ;

   Abstract : The vast expansion of intermittent sustainable energy generation has favoured a gradual adoption of lithium-ion batteries in various industrial and automotive applications. Despite its many inherent merits, this storage technology is very vulnerable to temperature variations: the performance and lifespan of LIBs are substantially influenced by their load cycles, thermal behaviours, and operating temperature range. READ MORE

6. 5. Deepening Automation and Wealth Inequality: An Intergenerational Perspective

   University essay from Handelshögskolan i Stockholm/Institutionen för nationalekonomi

   Author : Zhaoqin Zhu; [2021]
   Keywords : Deepening automation; Tax policies; Intergenerational transfers; Wealth inequality; Aging population;

   Abstract : The fast development of automation technology has been widely recognized as a key reason for the rising wealth inequality in the US since 1980s, and current literature focuses on the channel of increasing wage inequality triggered by deepening automation. This thesis contributes to the literature by examining the interaction between autonomation and an additional channel: cross-generation wealth accumulation via bequests. READ MORE