該文檔為LTE優化案例高速道路定稿版講解文檔,是一份很不錯的參考資料,具有較高參考價值,感興趣的可以下載看看………………
標簽: lte
上傳時間: 2022-03-10
上傳用戶:ttalli
該文檔為LTE排障流程及典型案例講解文檔,是一份很不錯的參考資料,具有較高參考價值,感興趣的可以下載看看………………
標簽: lte
上傳時間: 2022-03-10
上傳用戶:
該文檔為LTE核心網常見故障和投訴案例分析講解文檔,是一份很不錯的參考資料,具有較高參考價值,感興趣的可以下載看看………………
標簽: lte
上傳時間: 2022-03-10
上傳用戶:
ML7820+Mini PCI-E LTE 無線模塊是一款適用于 FDD-LTE/TDD-LTE/TD-SCDMA/WCDMA/EDGE/GPRS/GSM 多種網絡制式的無線產品,采用標準 Mini PCI-E 封裝形式,接口成熟。可以提供短信、通訊簿、高速數據等多種功能,可廣泛應用于移動寬帶接入、視頻監控、手持終端、車載設備等產品。
上傳時間: 2022-03-24
上傳用戶:
本書詳細介紹了LTE物理層相關協議及算法實現,包括LTE協議棧結構、LTE時域、頻域和空間域資源、下行參考信號、下行L1、L2控制信道、PDSCH信道、傳輸模式、上行參考信號、PUCCH信道、PUSCH信道、CSI資源指示、上行HARQ、下行HARQ、SR、BSR、DRX、MAC復用與邏輯信道優先級、上行同步、小區搜索過程、系統信息、隨機接入過程、尋呼、載波聚合、SPS、TTI bundling、RLC等相關協議和算法,所涉及的專題內容分析非常細致,非常詳盡,能很好地幫助讀者深入理解LTE物理層相關協議。
上傳時間: 2022-06-01
上傳用戶:
現在 5G 備受關注,不過在未來幾年中 4G 還會承擔蜂窩物聯網連接很大的一個份額,也是運營商蜂窩物聯網收入的主要來源。其中 LTE Cat1 是介于高速 LTE 類別及低速物聯網之間的一種 IoT 指定類別,LTE Cat 1是一個值得關注的分支。從目前蜂窩物聯網發展的態勢看,LTE Cat 1 承擔 4G 物聯網連接主力的時機已經開啟。
上傳時間: 2022-06-05
上傳用戶:kingwide
AP4000MT模塊是一款插針式4G網絡模塊,支持2*2貼片卡和外置SIM卡,實現UART 轉LTE雙向透傳功能;支持LTE-FDD、LTE-TDD、WCDMA、GSM通信網絡,真正實現廣 覆蓋,長距離,全國漫游,為用戶提供實時、穩定、透明數據傳輸的通信網絡。本產品所有 引腳引出,用戶使用更加方便;只需通過簡單的設置,即可實現串口到網絡的雙向數據透明 傳輸。
上傳時間: 2022-06-06
上傳用戶:
隨著個人通信和移動通信技術在世界范圍內的迅猛發展,人們對移動通信的服務質量要求也越來越高.WCDMA(Wideband Code Division Multiple Access)作為第三代移動通信系統的三大標準之一,因為具有優良的通信質量和較高的頻譜利用率而被廣泛應用.在WCDMA接收機中,射頻前端電路占有重要的地位,其性能優劣直按影響著接收機的接收靈敏度以及后繼信號處理部分的性能.因此,進行WCDMA射頻電路的研究和設計具有重要的現實意義.天線和低噪聲放大器(LNA)是射頻(RF)接收機芯片的重要組成部分。本文在廣泛查閱國內、外參考文獻的基礎上,對微帶天線的寬頻帶技術和LNA的設計原理進行了深入地研究.綜合多種寬頻帶技術,本文采用L形探針饋電與雙E形槽貼片相結合的方法,提出了一款適合于WCDMA基站的寬頻帶微帶天線結構。利用電磁仿真軟件HFSS對該天線的性能進行了研究,研究了天線貼片尺寸對天線性能的影響。在此基礎上,優化設計了適用于WCDMA基站的寬頻帶微帶天線,并對其進行了加工、測試和分析,仿真和測試結果均表明,該天線-10dB回波損耗帶寬為520MHz,天線在2GHz的增益為7.88dBi,滿足WCDMA基站的要求.另外,本文還根據WCDMA基站對LNA性能的要求,利用仿真軟件ADS(Advanced Design System)設計了一款高線性的兩級平衡低噪聲放大器,給出了電路原理圖,并制作了版圖,結果表明,該低噪聲放大器在1.92GH2~1.98GHz頻段增益不低于30dB,噪聲系數小于1dB,滿足WCDMA的要求,具有一定的實用價值。
上傳時間: 2022-06-20
上傳用戶:
PrefaceDuring the past years, there has been a quickly rising interest in radio access technologies for providingmobile as well as nomadic and fixed services for voice, video, and data. The difference indesign, implementation, and use between telecom and datacom technologies is also becoming moreblurred. One example is cellular technologies from the telecom world being used for broadband dataand wireless LAN from the datacom world being used for voice-over IP.Today, the most widespread radio access technology for mobile communication is digital cellular,with the number of users passing 5 billion by 2010, which is more than half of the world’s population.It has emerged from early deployments of an expensive voice service for a few car-borne users,to today’s widespread use of mobile-communication devices that provide a range of mobile servicesand often include camera, MP3 player, and PDA functions. With this widespread use and increasinginterest in mobile communication, a continuing evolution ahead is foreseen.This book describes LTE, developed in 3GPP (Third Generation Partnership Project) and providingtrue 4G broadband mobile access, starting from the first version in release 8 and through the continuingevolution to release 10, the latest version of LTE. Release 10, also known as LTE-Advanced,is of particular interest as it is the major technology approved by the ITU as fulfilling the IMTAdvancedrequirements. The description in this book is based on LTE release 10 and thus provides acomplete description of the LTE-Advanced radio access from the bottom up.Chapter 1 gives the background to LTE and its evolution, looking also at the different standardsbodies and organizations involved in the process of defining 4G. It also gives a discussion of the reasonsand driving forces behind the evolution.Chapters 2–6 provide a deeper insight into some of the technologies that are part of LTE and itsevolution. Because of its generic nature, these chapters can be used as a background not only for LTEas described in this book, but also for readers who want to understand the technology behind othersystems, such as WCDMA/HSPA, WiMAX, and CDMA2000.Chapters 7–17 constitute the main part of the book. As a start, an introductory technical overviewof LTE is given, where the most important technology components are introduced based onthe generic technologies described in previous chapters. The following chapters provide a detaileddescription of the protocol structure, the downlink and uplink transmission schemes, and the associatedmechanisms for scheduling, retransmission and interference handling. Broadcast operation andrelaying are also described. This is followed by a discussion of the spectrum flexibility and the associated
上傳時間: 2022-07-08
上傳用戶:
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上傳時間: 2022-07-18
上傳用戶: