baseband layer 中文意思是什麼
baseband layer
解釋
基帶層-
And typical super heterodyne structure in rereiver part. this scheme benefited to reduce frequency error and phase error, and had the advantages of good dynamic range and selectivity, short exploitation cycle and small venture in the given performance demand, etc. this system implemented a six - layer hoard rf handset model together with baseband by using advanced eda tool veribest 2000
系統設計應用hd155131的gsm900 dcs1800雙頻解決方案，發射機部分主要採用offsetpll方案，該方案有利於減小系統的頻率誤差和相位誤差；接收機部分採用典型的超外差式結構，它具有優良的動態范圍和選擇性，在給定的性能要求下具有開發周期短、風險小等特點。 -
In detail, the author narrates the function and working elements of network card, and the signal processing from baseband to if to rf, also the protocol process of medium access control ( mac ) layer
詳細講述了網卡的功能構成、工作原理、從射頻到中頻到基帶的信號處理過程、以及媒體訪問控制層（ mac ）協議處理方法等。 -
( before the proposal of this standard, use of ofdm was limited to continuous transmission systems ) combined with the national high technology project named " key techniques of the wireless module in fieldbus facilities ", author focuses on the research of baseband technologies of ieee802. il / lla physical layer, and put forward some novel algorithms about the timing and frequency offset synchronization and the channel estimation of ofdm transreceiver in wlan, which have been published on some kernel transaction and international conference and shows the author ' s great research achievements
結合作者研究生階段「現場總線設備中的無線通信模塊關鍵技術研究」 863課題，作者對ieee802 . 11 11a [ 1 ]物理層基帶部分相關技術做了深入研究，提出了無線局域網中ofdm基帶系統時間同步、頻偏估計以及通道估計等關鍵演算法，在國內核心期刊和國際會議上發表了相關學術論文，本文在此基礎上完成的。 -
Firstly the paper makes a survey of the development of bluetooth technology in the internal and the external, explains charactoristic and application of bluetooth, points out the purpose and significance of developing bluetooth application. secondly, based on the sig bluetooth specification version1. 1, it analyses the wholesome framework of specification of bluetooth technology and the contents of the bluetooth protocol stack. thirdly, it discusses the wireless layer, baseband layer and hci in detail
本文首先介紹了藍牙技術的國內外發展概況，簡述了藍牙技術的主要特點和應用，指出了開發藍牙應用的目的和意義；然後以藍牙規范1 . 1版本為基礎，論述了藍牙規范的完整框架和藍牙協議棧的具體內容，其中重點分析了傳輸協議組、中間件協議組和應用組；最後對低層的藍牙傳輸組中的無線層、基帶層和主機控制器介面進行了詳細的分析。 -
In the gsm system, error - control is the key - technology of the wireless - interface. combining the error - control technology with the software and hardware, in the baseband transmit part of the gsm mobile station test set, i ' ll provide a module which can accomplish the physical layer ' s protocol of the wireless - interface., and the fec technologies, such as cyclic code, convolutional code and viterbi decode, can be achieved by the baseband module, too
差錯控制技術是gsm移動通信系統無線介面協議的核心內容，本課題的任務是將差錯控制技術的原理與相關的軟、硬體結合起來，在gsm移動電話綜合測試儀的數字基帶模塊中實現gsm無線介面的物理層協議，完成差錯控制技術中的循環碼、卷積碼、交織、 viterbi譯碼等前向糾錯技術。 -
This thesis focuses on the baseband technology of ieee 802. 11 / 1 ib physical layer, which includes the characteristics of indoor multipath channel ieee 802. 11 confronts, estimation of this type of channel, modulation and receiver structure
本文主要研究ieee802 . 11 11b物理層的基帶部分的有關技術，包括ieee802 . 11所面臨的通道的特點、通道的估計以及調制和有關接收技術等。
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