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  2. Telecommunications link - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_link

    Pertaining to radiocommunication service, a downlink (DL or D/L) is the portion of a feeder link used for the transmission of signals from a space radio station, space radio system or high altitude platform station to an earth station. In the context of satellite communications, a downlink (DL) is the link from a satellite to a ground station.

  3. High Speed Packet Access - Wikipedia

    en.wikipedia.org/wiki/High_Speed_Packet_Access

    High Speed Downlink Packet Access (HSDPA) is an enhanced 3G (third-generation) mobile communications protocol in the High-Speed Packet Access (HSPA) family. HSDPA is also known as 3.5G and 3G+ . It allows networks based on the Universal Mobile Telecommunications System (UMTS) to have higher data speeds and capacity.

  4. List of preprint repositories - Wikipedia

    en.wikipedia.org/wiki/List_of_preprint_repositories

    A platform for rapid author-led publication and open peer review of research funded by the Bill & Melinda Gates Foundation >100 2017 Bill & Melinda Gates Foundation: HAL [13] Multidisciplinary: Open archive for scholarly documents from all academic fields >1,00,000 2001 Centre pour la communication scientifique directe: HRB Open Research: Medicine

  5. List of free and open-source software packages - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    This is a list of free and open-source software (FOSS) packages, computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition may be more appropriately called free software ; the GNU project in particular objects to their works being referred to as open-source . [ 1 ]

  6. Orthogonal frequency-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_frequency...

    VOFDM was proposed by Xiang-Gen Xia in 2000 (Proceedings of ICC 2000, New Orleans, and IEEE Trans. on Communications, Aug. 2001) for single transmit antenna systems. VOFDM replaces each scalar value in the conventional OFDM by a vector value and is a bridge between OFDM and the single carrier frequency domain equalizer (SC-FDE).

  7. List of academic databases and search engines - Wikipedia

    en.wikipedia.org/wiki/List_of_academic_databases...

    FREE Resources: 3 articles every 2 weeks (Register and Read Program, archived journals). Also, early journals (prior to 1923 in US, 1870 elsewhere) free, no registry necessary. Free and Subscription JSTOR [88] Jurn: Multidisciplinary Jurn is a free-to-use online search tool for finding and downloading free full-text scholarly works.

  8. Space segment - Wikipedia

    en.wikipedia.org/wiki/Space_segment

    A telecommunications satellite. The space segment comprises the uplink, the satellite itself, and the downlink A large parabolic antenna in a satellite Earth station. The space segment of an artificial satellite system is one of its three operational components (the others being the user and ground segments).

  9. Hyphanet - Wikipedia

    en.wikipedia.org/wiki/Hyphanet

    Hyphanet (until mid-2023: Freenet [5]) is a peer-to-peer platform for censorship-resistant, anonymous communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web without fear of censorship.