Sökning: "Rayleigh Fading Channel"

Visar resultat 1 - 5 av 49 uppsatser innehållade orden Rayleigh Fading Channel.

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

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

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

   Sammanfattning : 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. LÄS MER

3. 2. Performance Analysis of STTC-Based MIMO Under Cognitive RadioScenarios

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för datavetenskap

   Författare :Sanjana Kankantee; Sai Praneeth Reddy Ganta; [2023]
   Nyckelord :Space-time trellis coding; MIMO; Cognitive radio; Performance; Bit error rate; Diversity; AWGN; Rayleigh fading; Detection; Spectrum.;

   Sammanfattning : This thesis presents a comprehensive investigation into improving wireless transmission rates and reliability through the implementation of Space Time Trellis Codes(STTC). The study focuses on enhancing the coding gain, diversity gain, and flexible transmission capabilities, which are crucial for Error-Correcting Codes (ECC)in wireless communications. LÄS MER

4. 3. Importance Sampling in Wireless Communication Systems with Ultra-Low Error Rates

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Bharat Maheshwari; Yewen Zhou; [2022]
   Nyckelord :error region; Monte Carlo; importance sampling; rejection sampling; Kullback-Leibler divergence.; Technology and Engineering;

   Sammanfattning : Simulation mimics the behaviour of real world processes or the system over time. It helps us to understand the impact of modification and the effect of introducing various interventions to a system. LÄS MER

5. 4. Objective Perceptual Quality Assessment of JPEG2000 Image Coding Format Over Wireless Channel

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

   Författare :Bala Venkata Sai Sundeep Chintala; [2019]
   Nyckelord :Discrete Wavelet Transform DWT ; Image Coding Format; JPEG2000; Objective Perceptual Quality assessment; Quality of Experience QoE ;

   Sammanfattning : A dominant source of Internet traffic, today, is constituted of compressed images. In modern multimedia communications, image compression plays an important role. Some of the image compression standards set by the Joint Photographic Expert Group (JPEG) include JPEG and JPEG2000. LÄS MER

7. 5. Performance of physical layer security with different service integrity parameters

   Master-uppsats,

   Författare :Akhila Naga Sree Ravali Padala; Kavya Kommana; [2018]
   Nyckelord :Physical layer security; outage probability; symbol error rate; secrecy capacity;

   Sammanfattning : Information security has been a very important issue in wireless networks. With the ever-increasing amount of data being exchanged over wireless networks, the confidentiality of information needs to be protected from unauthorized users called eavesdropper. LÄS MER