時隙碼 的英文怎麼說
中文拼音 [shíxìmǎ]
時隙碼
英文
time slot code-
Shoe - size adjustment of claw tray uses left and right claw trays to make parallel contraction and enlargement to both sides. the left and right claw tray can turn and move singly. the adjustment is accurate and quick, so that it avoids angles creation among cloths gaps
爪盤鞋碼大小調整縮放：採用了左右爪盤同時向兩側平行縮放，左右爪盤也可單獨轉動移動，調整準確快速，並可預防布縫間隙產生角。Pcma is a fundamentally new technique for two - way satellite and a novel method for frequency re - use which allows two different earth stations to use the same frequency, time slots and / or cdma code at the same time
Pcma技術是用於雙向衛星通信的一種嶄新技術，是一種全新的頻率復用方式，它允許兩個不同的衛星地面站同時使用完全相同的頻率、時隙或擴頻碼字。Similar to asama protocol, qasama protocol applies ppo and go algorithm, but qasama protocol also considers the requirements of packet delay, packet drop rate, bit error rate ( ber ), traffic capacity and channel utilization, and integrates these requirements into the slot allocation procedure
在qasama協議中，綜合考慮了分組時延，分組丟棄率，誤碼率，業務容量以及通道利用率方面的要求，並將這些要求與多波束智能天線的特點及自適應時隙分配過程有機地結合起來。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。Cdma has become the main technology of the third generation mobiletelecommunication. many users in cdma system are distinguished by differentspread sequences and have the same time chip and frequency unlike in theconventional tdma system or fdma system. but the practical spread sequences cannot reach the ideal condition, the correlation function equals zero, so that it will causethe multiple access interference ( mai ) when lots of people are communicating. multi - user detection ( mud ) makes joint detection on the received signals by makingfull use of the information of all users ’, which relaxes mai and increases the capacityof system
Cdma技術已經成為第三代移動通信系統中的主流技術，它與傳統的fdma 、 tdma不同，在cdma系統中多個用戶均佔用同一時隙、同一頻隙，所不同的是選取的地址碼不同，而實際選用的地址碼間的互相關函數又不可能全部達到理想狀態的全為零，因而造成了多個用戶同時通信時，必然要產生多址干擾。Assigning serial different address code to different subscribers, useful signal is taken out of the same time slot and frequence, and is transmitted with one share channel. at received end, system makes use of completed address code from sending end to do correlative check and take out useful subscriber signal. the other address code signals are treated as broadband disturbing signal which is removed. in radio environment of existing variable disturbtion and muti - way declining, expand frequence signal ’ s broadband characteristics can improve system performance obviously. cdma mobile telecommunication system has some better characteristics, such as anti - disturbing 、 anti - way declining 、 secrecy 、 capacity 、 utilizing rate of frequence resource and so on, than other mobile telecommunication system
Cdma （ codedivisionmultipleaccess ）移動通信系統的技術基礎是基於擴頻技術的碼分多址，通過給不同的用戶分配各自特定的地址碼序列，將處于相同時隙和頻率的用戶信號分離開來，採用共享通道方式傳輸信息。在接收端，系統利用與發送端完全一致的本地地址碼對接收信號進行相關檢測，提取需要的用戶信號，而將其他使用不同碼型的信號視為寬帶干擾而從中剔除掉。分享友人