作業系統上接通LTE-A的標誌]]
進階長期演進技術，又譯作長期演進技術升級版（，缩写LTE-A），是長期演進技術（LTE）的提升版本，理論上網速度比3G快十倍以上，也是4G規格的國際高速無線通訊標準。
是一个于2009年末正式作为4G系统递交至ITU-T的标准，并先后通过国际电信联盟、IMT-Advanced，最终于2011年3月为3GPP完成。它被3GPP标准化成为主要的LTE增强标准。
進階LTE的目標是要達到並超越國際電信聯盟的要求。該版本與第一個版本LTE設備兼容，並與第一個版本LTE共用頻段。
簡介
第一個版本的LTE格式是由日本電信商NTT DoCoMo所提出的，並且被承認為國際標準，最初於2009年12月在瑞典和挪威提供服務。以1GB影片需要的下載時間來說，3G頻寬需要約10分鐘，但若是採用4G LTE，不到1分鐘即可完成下載。同時高頻寬在電話語音時將語音資料切割成封包來傳送，能達到更佳的音質，稱為「VoLTE（Voice over LTE）」。
同時機器類型通訊（Machine-Type Communications，簡稱MTC）協定讓4G有跨入物聯網的重要能力，這是一個適合低資料量、低功耗及低成本設計的通訊機制。MTC未來使用的頻寬會以1.4MHz為主並運作在LTE雙工模式中（例如全雙工/半雙工FDD或TDD）。而裝置對裝置通訊（Device-to-Device，簡稱D2D）協定讓手機裝置間在無基地台情況下短距互聯，第一線急難救助人員在資訊傳輸、溝通互動與訊息交換的災區需求上此一功能可以發揮效果。
技術
*非授權頻段(LTE in unlicensed spectrum，簡稱LTE-U)
*载波聚合(Carrier Aggregation，簡稱CA):载波聚合技术是传统多载波技术的发展。其核心思想是把至多5个连续或离散频谱划分为多个成员载波（Component Carrier，CC），允许终端在多个子频带上同时进行数据收发。
*高阶MIMO(Elevation Beamforming / Full-Dimension MIMO，簡稱EB/FD MIMO)
*干扰协调(Enhanced Inter-Cell Interference Coordination, 簡稱eICIC)
*機器類型通訊(Machine-Type Communications，簡稱MTC)
*裝置對裝置通訊(Device-to-Device，簡稱D2D)
*多人傳輸技術(multi-user transmission techniques)
*室內定位(Indoor positioning)
*小區群播服務(Single-cell Point-to-Multipoint，簡稱SC-PTM)
注釋
參考文獻
延伸阅读
- [http://www.qualcomm.com/solutions/wireless-networks/technologies/lte-advanced Qualcomm]
- Harri Holma, Antti Toskala, LTE for UMTS - OFDMA and SC-FDMA Based Radio Access, John Wiley & Sons 2009, ISBN 978-0-470-99401-6 [http://books.google.com/books?id=uhr3KwSww2kC&pg=PA19&dq=LTE-advanced&hl=sv&cd=1#v=onepage&q=LTE-advanced&f=false Chapter 2.6: LTE Advanced for IMT-advanced] , pp 19–21.
- Moray Rumney (editor), LTE and the Evolution to 4G Wireless: Design and Measurement Challenges, Agilent Technologies Publication 2009, ISBN 978-0-470-68261-6, [http://books.google.com/books?id=boePyryvxRAC&pg=PT443&dq=LTE-advanced&hl=sv&cd=4#v=onepage&q=LTE-advanced&f=false Chapter 8.7: Proving LTE Advanced] , p 425
- Preben E. Mogensen, Tommi Koivisto, Klaus I. Pedersen 1, et al.; Nokia Siemens Networks;[http://archive.wikiwix.com/cache/20110719174240/ftp://lenst.det.unifi.it/pub/LenLar/proceedings/2009/wv09/WVITAE09/PDF/AUTHOR/WV091418.PDF LTE Advanced: The Path towards Gigabit/s in Wireless Mobile Communications], Wireless VITAE'09.
*[http://lteportal.com/MediaChannel/Articles/LTE__LTE-Advanced;6/Regulation,_Standards,_Spectrum;31/ITU-R_Confers_IMT-Advanced_%284G%29_Status_to_3GPP_LTE;1735?2 ITU-R Confers IMT-Advanced (4G) Status to 3GPP LTE] – LTE-Advanced is officially 4G
- [http://lteportal.com/LTE_Business_Guide The LTE / LTE-Advanced Guide] – a semi-annual publication on LTE / LTE-Advanced, May and November 2010 publications are now available
- [http://www2.rohde-schwarz.com/file/1MA169_2E.pdf LTE-Advanced Technology Introduction] - This white paper summarizes necessary improvements, which are known as LTE-Advanced
- [https://web.archive.org/web/20110303201709/http://cp.literature.agilent.com/litweb/pdf/5990-6706EN.pdf Introducing LTE-Advanced] - Application Note
- [http://www2.rohde-schwarz.com/file/1MA161_0e.pdf LTE Bitstream Verification] - Application Note about verification of baseband data of LTE/LTE-A-ready products.
*[http://www2.rohde-schwarz.com/file/1MA186_0e.pdf LTE Transmission Modes and Beamforming] - This white paper discusses the basics of beamforming and explains the eight MIMO transmission modes in LTE Release 9.
外部連結
*[http://www.qualcomm.com/products_services/airlinks/lte_advanced.html LTE-Advanced] page on Qualcomm site
*[https://web.archive.org/web/20081208085012/http://www.3gpp.org/article/lte-advanced 3GPP Official 3GPP Standardisation Page on LTE-Advanced]
*[http://www.radio-electronics.com/info/cellulartelecomms/lte-long-term-evolution/3gpp-4g-imt-lte-advanced-tutorial.php LTE-Advanced overview]
*[http://www.ict-befemto.eu/ Future use of LTE A femtocells]
*[http://www.lteportal.com LTE Portal] – 3GPP LTE / LTE-Advanced Technology, dedicated portal created for information sharing, collaboration, and networking
Long Term Evolution#LTE-Advanced
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