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- It is theoretically analyzed that achievable rates in multiuser Multiple-Input Multiple-Output（MIMO） Systems.The achievable rate in uplink and downlink channel will be obtained. 摘要 理论地分析计算了多输入多输出（MIMO）系统中多用户的最大可达传输速率，其中分别包括上行和下行速率。
- Coupling can happen at different places of the uplink and downlink channels. 上下行信道之间产生耦合的原因有多种，避雷设施的安装不当也是其中之一。
- The key advantage of CDMA/TDD system is to accommodate asymmetric traffic by allocating number of uplink and downlink channels. 摘要:CDMA/TDD系统的主要优点是它藉由分配上下传通道的数目提供非对称的流量需求。
- uplink and downlink channel 上行和下行信道
- Therefore, the relationship between uplink and downlink is the base and strength element of MLM system. 所以上下线传销商之间的关系，是多层次传销组织发展的最基本的架构，也是最主要的力量。
- Time Division Multiple-Access（TDMA） is compared with the MIMO enable system in uplink and downlink. 在MIMO系统中分析比较了时分多址（TDMA）的多用户实际可达的传输速率。
- Every single state will affect the relationship between uplink and downlink on how they build up, maintain and expend. 各个互动阶段，牵涉上下线的关系是如何形成、建立、维持、拓展。
- According to the characteristics of satellite communication system,the feasibility of uplink and downlink signal which are scouted and interfered is analyzed. 卫星通信网是一个规模大、造价高的复杂通信系统,计算机仿真技术作为一种辅助手段具有非常重要的作用。
- An analog signal and digital signal acquisition system is designed for automobile testing based on single-chip C8051F021, employing CAN bus for uplink and downlink. 摘要利用C8051F021，设计了用于机动车检测现场的模拟和数字信号的采集系统，用CAN总线实现与上位机的数据交换。
- Time Division Duplex (TDD) is a kind of duplex method of communication system, by which uplink and downlink transmissions are time separated in mobile communications. 时分双工 (TDD)是一种通信系统的双工方式 ,在移动通信系统中用于分离接收和传送信道。
- Compared with the FDD system, TD-SCDMA adopting TDD, has no need of symmetrical frequency bands for uplink and downlink, and enables flexible and convenient planning and use of increasingly scarce spectrum resources. 与FDD系统相比，TD-SCDMA采用时分双工方式，上下行无需对称频段，可以见缝插针，灵活方便地规划使用日益紧张的频谱资源。
- uplink and downlink multiple access 上下行多址
- Scan for downlink channel and establish synchronization with BS. 用户端设备扫描下行信道，之后于基站建立同步。
- Telstar 11 was a straight repeater with a 6.5-GHz uplink and a 4.1-GHz downlink. 通讯卫星2号是有着6.;5吉赫兹的上行线4
- The time slots in each super-frame are allocated for downlink and uplink and for different radio technologies (e.g., W-CDMA and OFDM) based on loading. 基于负载，为下行链路和上行链路以及不同的无线电技术(例如，W-CDMA和OFDM)分配每个超帧中的时隙。
- In fact, another way of saying the latter is insufficient demand, the price index in the downlink channel. 实际上,后者的另一种说法就是需求不足,价格指数处于下行通道。
- The TDD-CDMA system with unbalanced slot allocation between uplink (UL) and downlink (DL) will cause the cross-slot interference which may be inferior to system. TDD-CDMA系统的上下行时隙的不对称性可以造成严重的交叉时隙干扰。
- DFT is used to estimate the covariance matrix of downlink channel of the path, not calculating DOA. 在不求出DOA的情况下,采用离散傅里叶变换来估计该路径下行信道协方差矩阵。
- Uplink cross-pol interference is usually occurred at one or several certain carriers, and downlink cross-pol interference usually affects the whole receiving frequency band. 上行反极化干扰通常只出现在一个或某几个载波上，下行反极化干扰通常影响整个接收频段。
- Base station can still use the downlink channel to stay connected with mobile phones, or even to send incoming signal. 基站仍然可以使用下行信道与手机保持连接，甚至发送呼入信号。
