查询词典 transmission channel

A structure of space-time diversity virtual double-route weighting interference mitigating is proposed, and the corresponding practical algorithm is derived in detail using block matrix inversion formula and matrix inversion theory for mitigating interference signals from both other cells and other users of local cell in the DS-CDMA up-link communication case. Performances of such algorithm are thoroughly analyzed through simulation and analytical results. The up-link and down-link channel characters and their relationship of DS-CDMA communication system are thoroughly analyzed, and the relationship of space-time diversity weighting matrix between time division duplexing and frequency division duplexing these two different transmission ways is derived.

本论文深入地比较了DS-CDMA通信系统的上传情形与下传情形的信道特性及其它们相互之间的关系；深入地分析并得到了时分双工和频分双工两种不同的传输模式下的上传情形与下传情形的空时分集权系数矩阵之间的数量关系，从而使得能够利用在基站端所拥有的上传情形的空时分集接收权系数矩阵信息以及其他信息在基站端直接形成空时分集发射权系数矩阵；推导了下传情形移动用户接收机端的最优组合接收策略及其算法；进一步地，对时分双工传输模式下的下传情形的通信系统性能和频分双工传输模式下的下传情形的通信系统性能进行了深入的比较仿真研究。

The present project adopted the combination approach of electrical temperature probe and optical fiber transmission. Based on the mature technology of electrical detection, high-voltage insulation and anti- electromagnetic interference of optical fiber couple, the multi-channel itinerate detection system controlled by single-chip microcomputer has been designed to implement the on-line temperature monitoring for the most familiar electrical facilities ? contact points of high-voltage switches in power systems.

本课题便是采用电测温度探头和光纤传输相结合的方法，充分利用成熟的电传感技术和光纤耦合的高电压绝缘、抗电磁干扰性能强等优点，设计了单片微机控制下的多路温度巡回检测系统，实现了对电力系统中最常见的电气设备—高压开关触头温度的在线监测。

For example, a T-1 channel is a type of leased line that provides a maximum transmission speed of 1.544 Mbps.

例如，T-1 通道是提供最大传输速度为1.544 Mbps 的专用线路的一种。

The combination of Generalized Likelihood Ratio Test and Antenna Selection is applied to Unitarysignal transmission system, and antenna selection and signal detection do not require Channel State Information.

摘要该文提出了多天线传输系统的非相干天线选择算法，将广义似然比检验与天线选择结合应用于U码传输系统，天线选择和信号检测无需信道状态信息。

Computer simulations show that the scheme proposed increases the transmission efficiency, and at the same time, can obtain lower error bit rate and mean square error of channel estimation than conventional OFDM systems with relative low complexity.

仿真实验表明，该策略可提高传输效率、增强系统的抗噪性能、获得比传统OFDM系统更低的信道估计均方误差和误码率，且具有较低的计算复杂度。

A low-voltage power line channel model is built for studying the transmission performance of the scheme.

在模拟的低压电力线载波信道条件下，对调制解调方案进行了仿真。

The medium access control Technology focuses on multi-address access, that is, how to coordinate users sharing a common channel to achieve efficient and reliable transmission.

媒体接入控制技术的核心问题是如何协调多个用户共用一个信道实现高效可靠传输，即多址接入问题。

QIQD uses piecewise quadratic curves to calculate the multiplicator of contending window after a frame collision and the divisor of contending window after a successful transmission, respectively, which is capable of reducing collision probability and improving channel utilization.

QIQD通过分段二次曲线计算数据帧碰撞冲突后增大竞争窗口的倍乘因子和数据帧成功传输后减小竞争窗口的倍除因子，从而能够降低碰撞概率和提高信道利用率。

, Ca2+ may be one of the substances related to the needling sensation and channel transmission.

Ca2+可能是针刺得气、经络传导中参与的物质。

In this paper,the standard of RS 485 bus and its applications in an channel detecting and accident switching are introduced,and in the situation of overfull load notes or overlong transmission distance,a repeat circuit of RS 485 is proposed.

介绍了RS 485总线规范及其在远动信道监测及故障倒换中的应用，并针对负载节点过多或传输距离长的特点，提出了一种RS 485中继电路。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了