Essays about: "HARQ"

Showing result 1 - 5 of 8 essays containing the word HARQ.

  1. 1. Efficient Transmission over Unknown Channels

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

    Author : Ranjitha Gubbi Suresh; [2020]
    Keywords : Multi-Layer Transmission; RBIR; HARQ; mixing layers; successive demodulation; Wi-Fi; Technology and Engineering;

    Abstract : In recent years, digital transmission techniques have been continuously evolving by employing increasingly more advanced Modulation and Coding Scheme (MCS). However, when the wireless channel is varying rapidly, it is hard or even impossible for the transmitter to select the proper MCS. READ MORE

  2. 2. Reinforcement Learning for Link Adaptation in 5G-NR Networks

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

    Author : Evagoras Makridis; [2020]
    Keywords : ;

    Abstract : The Adaptive Modulation and Coding (AMC) scheme in the link adaptation is a core feature in the current cellular networks. In particular, based on Channel Quality Indicator (CQI) measurements that are computed from the Signal-to-Interference-plus-Noise Ratio (SINR) level of User Equipment (UE), the base station (e.g. READ MORE

  3. 3. On Forward Error Correction in IEEE 802.15.4 Wireless Sensor Networks

    University essay from Mittuniversitetet/Institutionen för informationsteknologi och medier; Mittuniversitetet/Institutionen för informationsteknologi och medier

    Author : Wei Li; Zhiyuan Guo; [2012]
    Keywords : IEEE 802.15.4 standard; WSN; FEC; HARQ; reliability; energy efficiency;

    Abstract : Wireless Sensor Networks (WSN) are used in many applications, for example industrial applications, automatic control applications, monitoring applications, to name but a few. Although WSN can employ different standards in order to achieve short range wireless communication, the mainstream of the market is toadopt the low-power, low-rate IEEE 802. READ MORE

  4. 4. Error Control in Wireless Sensor Networks : A Process Control Perspective

    University essay from Uppsala universitet/Signaler och System

    Author : Oskar Eriksson; [2011]
    Keywords : wireless sensor networks; process control; hybrid ARQ; forward error correction; FEC; HARQ; adaptive FEC;

    Abstract : The use of wireless technology in the process industry is becoming increasingly important to obtain fast deployment at low cost. However, poor channel quality often leads to retransmissions, which are governed by Automatic Repeat Request (ARQ) schemes. READ MORE

  5. 5. Fast Packet Retransmissions in LTE

    University essay from Linköpings universitet/Kommunikationssystem

    Author : Syed Tamoor-ul-Hassan; Serkan Demir; [2011]
    Keywords : Link Adaptation; HARQ; EHF; FTP; VOIP;

    Abstract : The cellular networks are evolving to meet the future requirements of data rate,coverage and capacity. The fourth generation mobile communication system, LTEhas been developed to meet these goals. LTE uses multiple antenna features andlarger bandwidths in order to accomplish this task. READ MORE