端设备扫描下行信道，之后于基站建立同步。
Scan for downlink channel and establish synchronization with BS.
建立了上行信道和下行信道的单光子捕获概率理论模型；
Theoretical models of the single-photon acquisition probability in an uplink channel and a downlink channel were established.
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。
Base station can still use the downlink channel to stay connected with mobile phones, or even to send incoming signal.
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。
DFT is used to estimate the covariance matrix of downlink channel of the path, not calculating DOA.
在发射机获得部分下行信道信息的情况下，提出了一种基于最佳权矩阵的MIMO -STBC发射机。
With partial channel state information at the transmitter, a novel transmitter based on the optimal weight matrix is proposed in MIMO-STBC system.
WCDMA标准在下行信道传输中采用了称作STTD的开环发射分集方案和两种反馈模式的闭环发射分集方案。
The open loop transmit diversity scheme, named as STTD, and two feedback close loop transmit diversity schemas in downlink channel communication was defined in WCDMA standard.
可以使用NEXT干扰和环路之一的下行信道传递函数来计算FEXT干扰，该NEXT干扰在环路的上游端的两条线路之间测量。
FEXT interference can be calculated using the NEXT interference measured between the two lines at the upstream ends of the loops and the downstream channel transfer function of one of the loops.
在具体实现上采用了QNX的多进程编程思想，对整个系统的流程进行了分析设计，将双下行信道的实现分为三个大的模块进行讨论。
In the implementation, we used the multiprocessing method in QNX to analyze the general flow chart of system, and divided the realization of dual downstream channel into three modules.
在一个实施例中，基站确定是否存在要发送到移动台的下行链路信道数据。
In one embodiment, the base station determines whether there is downlink channel data to transmit to a mobile station.
当一个READY状态的MS使用了DRX, DRX将在为下行数据传递分配数据包信道的时候被考虑进去。
When a GPRS MS in READY state USES DRX, DRX has to be considered when assigning a packet data channel for downlink transfer.
提出了一种适用于频率选择性衰落信道，新的下行多用户MIMO系统预处理传输方案。
A new transmission scheme, which combines transmit preprocessing with multiuser MIMO downlink system over frequency-selective fading channel is proposed.
在蜂窝无线网络下行链路的资源调度中，无线信道的时变特点对网络的吞吐量和用户之间的公平性有很大的影响。
In the cellular wireless network resource downlink scheduling, the network throughput and fairness have greatly affected by the channel time-varying characteristics.
提出了一种基于平均信道增益矩阵的分布式天线无线通信系统下行功率控制算法。
A power control algorithm for the downlink of a distributed antenna wireless communication system is proposed by the use of the average channel gain matrix.
对于专用信道，同步原语用于指示上行和下行无线链路的同步状态。
For the dedicated channels, synchronisation primitives are used to indicate the synchronisation status of radio links, both in uplink and downlink.
在对LTE同步信道的分析中，给出了一个可行的LTE下行同步和小区搜索检测方案。
During the analysis of the synchronization channel in LTE, a feasible solution to LTE downlink synchronization and cell search is detailed.
因此本文将重点围绕LTE下行OFDMA系统的信道估计技术展开研究。
So this thesis is engaged in the research of channel estimation technology for LTE downlink OFDMA system.
针对LTE下行OFDMA传输系统介绍了信道估计技术。
The channel estimation algorithms for LTE downlink OFDMA system are introduced in detail.
WCDMA中下行链路基带调制信道多，功能复杂，对其测试和验证所花费的时间和费用也随之提高。
In WCDMA system, downlink base band modulation involves a lot of channels and complex functions, resulting in prolonged time and higher costs for test and verification.
CD MA下行链路的性能受到信道衰落和多址干扰的影响。
The performance of downlink CDMA systems is influenced by channel fading and multi-access interference.
然后，根据一种自适应信道分配策略分析所收集的上行链路和下行链路干扰测量值。
Then, the collected uplink and downlink interference measurements are analyzed in accordance with an adaptive channel allocation strategy.
本文在分析TD _SCDMA系统下行链路基带离散时间传输模型的基础上，提出了一种下行链路信道估计的快速算法，并结合终端联合检测算法进行了计算机仿真。
In this paper a fast algorithm for channel estimation in downlink TD-SCDMA systems has been proposed by analyzing the discrete-time base-band transmission model.
对基于SCDMA接入方案的H FC上下行通信系统的发送机进行了功能仿真，为H FC接入网上行信道物理层的硬件实现创造了有利条件。
The function model of HFC communication system sender based on SCDMA is constructed in this paper, The modules of communication system can be simulated approaching the behavior of the hardware.
针对异构协同中继信道的特点，提出了上、下行的异构协同中继信道模型。
Considering the characteristics of heterogeneous cooperative relay channel, the uplink and downlink relay channel models are presented.
针对异构协同中继信道的特点，提出了上、下行的异构协同中继信道模型。
Considering the characteristics of heterogeneous cooperative relay channel, the uplink and downlink relay channel models are presented.
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