multiple access data system 中文意思是什麼
multiple access data system
解釋
多路存取數據系統-
Due to the data transmission characteristics between tags and reader, space division multiple access ( sdma ), frequency division multiple access ( fdma ) and code division multiple access ( cdma ) are applied in a limited way in rfid system. therefore, time division multiple ( tdma ) has been generally accepted. according to tdma, there are aloha protocol, s - aloha, binary - tree protocol, clipped binary - tree protocol and others
解決這個問題必須要用到多路存取法,針對射頻識別系統中閱讀器與應答器之間的通信特點,空分多路法、頻分多路法、碼分多路法在rfid系統中應用都受到一定的限制,只能應用到一些特定的場合,一般採用時分多路法,按照時分多路法的演算法有aloha演算法、時隙aloha演算法、二進制樹型搜索演算法、修剪枝的二進制樹型搜索演算法等防碰撞演算法協議,分析了各自特點以及存在的缺點。 -
In the code division multiple access ( cdma ) system, the multiple access interference ( mai ) mitigation capability as well as system capacity are determined, to a great extent, by the correlation properties of spreading sequences ; while adaptive modulation and coding ( amc ) with high spectral efficiency is the key technique to obtain high speed and low symbol error rate ( ser ) performance in mobile data transmission
在碼分多址( cdma )系統中,擴頻序列的特性在很大程度上決定了抗多址干擾( mai )能力和系統容量,而高頻譜效率的自適應調制編碼( amc )技術則是獲得高速率和低誤碼率( ser )移動數據傳輸性能的關鍵因素。 -
Cdma ( code division multiple access ) technology is used in communication system abroad because of its merit, people use cdma technology to transmit data, image and also other different information in different sub - frequent bands of a broad channel. so a research, which combines multi - carrier signal processing and cdma technology and processes different sub - frequent bands signal at same time, is full of practicable value
Cdma技術由於其優點被廣泛採用在通信系統中,人們在一個寬帶通道的不同子頻段上使用cdma技術傳輸數據、圖像等不同信息,所以將多載波信號處理與cdma技術聯系起來進行研究,並且同時將不同的子頻帶信號進行處理是一個很有實用價值的問題。
分享友人