Time division multiple access : a digital wireless telephony transmission technique 时分多址:一种数字无线电话传输技术。
Icao make a standard of very high frequency data link mode 4 ( vdl mode 4 ) on the basis of self - organizing time division multiple access ( s - tdma ) , this standard is considered to be one of the basic solutions of aviation mobile communication 该标准基于自组织时分多路访问技术,其主要特点是:支持实时应用,采用短消息进行信息交换,并且可以在缺少地面基础设施的情况下保障空空通信。
Since most of the 3g systems are evolved from different incompatible 2g systems like cdma code division multiple access , gsm global system for mobile communication and tdma time division multiple access , therefore the imt - 2000 standard will ensure the compatibility and interoperability of different systems in 3g . 3g is broadband and packet - based 由于大部份3g系统是由多种不能兼容的2g系统,如码分多址code division multiple access ,简称cdma , gsm及时分多址time division multiple access ,简称tdma制式演进过来的,因此, imt - 2000标准是要保证3g系统所包含的各种程式的兼容及互用性。
First of all , we bring forward the basic project of tadil , which adapts to combined operations . it is suggested to use tdma ( the abbreviation of time division multiple access ) as the working pattern and utilize the concept of mobile ad hoc network to construct the data link network . aiming at the impact of time delay on data link and the characteristic of cooperative combat under the command of director aircraft , this thesis applies a kind of kalman filtering algorithm in polar coordinates to compensate the error of time delay , and then does the transformation of target motion parameters to obtain the current information of target 本文结合空军装备部某“十五”预研课题,围绕着战术数据链、多机协同多目标攻击、超机动攻击、空对地攻击这四个方面展开了一系列的研究工作:本文首先给出了适应三军联合作战的战术数据链系统的基本方案,建议采用时分多址的工作模式,并利用移动自组织网络的概念构建数据链网络,同时针对数据链传输信息的时间延迟特性和指挥机指挥下的多机协同作战特点,应用一种极坐标系下的卡尔曼滤波算法对该传输延迟误差进行补偿,并在此基础上进行目标运动参数的转换,以获得目标相对于某无人机的当前运动信息,且利用仿真验证了方法的有效性。
Since most of the 3g systems are evolved from different incompatible 2g systems like cdma ( code division multiple access ) , gsm ( global system for mobile communication ) and tdma ( time division multiple access ) , therefore the imt - 2000 standard will ensure the compatibility and interoperability of different systems in 3g . 3g is broadband and packet - based 由于大部份3g系统是由多种不能兼容的2g系统,如码分多址( codedivisionmultipleaccess ,简称cdma ) , gsm及时分多址( timedivisionmultipleaccess ,简称tdma )制式演进过来的,因此, imt - 2000标准是要保证3g系统所包含的各种程式的兼容及互用性。
Time division multiple access (TDMA) is a channel access method for shared medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots.