space division multiple access 中文意思是什麼
space division multiple access
解釋
空分多址-
The smart antenna, which is adapted in the wireless mobile communication system, in fact, forms an antenna with a high gain. thus communication in all directions can be proceeded, then base station antenna coverage, system capacity and service quality are improved, also inter - symbol interferes and multi - access interfere are reduced. the space division multiple access ( sdma ) is introduced, and users can be distinct from each other through their special location
在無線移動通信系統中採用智能天線技術,實際上是通過數字信號處理,使天線陣為每個用戶自適應地進行波束賦形,相當于為每個用戶形成了一個可跟蹤它的高增益天線,從而即可以進行全方位通信,也可以用較小的發射功率覆蓋相同的范圍以及提高系統容量和業務質量、降低用戶間的碼間干擾和多址干擾。 -
Uplink equivalent space - time multiuser detection for multicarrier code - division multiple access systems
系統盲空時通道估計及多用戶檢測 -
Uplink space - time channel blind estimation for space - time coded multicarrier code division multiple access systems
空時編碼多載波碼分多址系統上行空時通道盲估計 -
Simulation results show that abf - csma / ca protocol can realize space - division - multiple - access ( sdma ) and provide very high channel utilization. chapter 3 considers employing smart antennas in the central access point ( cap ) of wireless internet access networks
第三章研究了智能天線在internet無線接入網路中的應用,主要考慮使用智能天線對抗同通道干擾與多徑衰落,增加覆蓋范圍,並在mac層實現智能天線與網路的有機結合。 -
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。 -
Beamforming comes from smart antenna with strengthening desired signal and suppressing inter - users interference as its typical technical superiority. it is also the base to realize sdma ( space division multiple access )
波束形成技術源於智能天線、增強期望、抑制用戶干擾是其典型的技術優勢,也是sdma ( spacedivisionmultipleaccess )能夠得以實現的基礎。 -
Sdma space division multiple access
空分多址 -
Space division multiple access sdma
空分多址
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