Essays about: "ARQ"

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

  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

  3. 2. Secure device to device communication

    University essay from KTH/Kommunikationsteori

    Author : Nathalie Sahlström; [2014]
    Keywords : ;

    Abstract : Since wireless communication has become a standard feature in the daily life, smartphones and tablets among other things are integrated with the Bluetooth technology. While in some parts of the day wireless communication can be used for searching the internet and share information on social networks without the need of having a secure connection, there are some other parts where the security might become of high importance. READ MORE

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

    University essay from 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. 4. Scheduling Algorithms and QoS in HSDPA

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Javed Iqbal; Basit Mustafa; [2009]
    Keywords : HSDPA; QoS; Scheduling Algorithms;

    Abstract : High Speed Downlink Packet Access (HSDPA) is the extension to the Universal Mobile Telecommunication System (UMTS). HSDPA allows for higher data rates due to new adaptive Modulation and Coding (AMC) techniques, Hybrid Automatic Repeat reQuest (H-ARQ) and fast scheduling algorithm. READ MORE

  6. 5. ARQ PROTOCOLS SUPPORTING QOS IN EMBEDDED SYSTEMS

    University essay from Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Author : Aydin Beheshtizadeh Mofrad; [2008]
    Keywords : QoS; ARQ; Embedded Systems; Real-Time Communication; Reliable Transmission; scheduling;

    Abstract : Many efforts have been carried out to provide transmission reliability in the history of communication systems. As the demand for real-time applications increased, providing a reliable communication in a timely manner for such applications is strongly desired. Considering timing constraints makes the issue of achieving reliability more difficult. READ MORE