中继

The channel capacity and resource optimization are the two primary research topics in relaying system.

中继系统的信道容量以及资源优化方案是中继系统中重要的研究课题。

An interval transmission channel of the truck communication system is used as exchange system line; the concerted action of controllers in different stations choose the same relay channel to realize the communication among the users on different stations; an interoffice truck circuit is arranged between two end stations in the system, in order to realize the communication between the system and the exterior.

本发明为一种集交换和传输为一体的中继通信系统，即用中继传输系统中的区间传输信道作为交换系统的线路，由不同站的控制器协同动作选通同一条中继信道实现不同站用户间的通信，该系统两端站设置局间中继电路，实现本系统与外界的通信。

In terms of average Symbol-Error Rate at the destination, the performances of multi-relay cooperative transmission with Maximal Ratio Combining detection and opportunistic relaying with multi-node listening were analyzed, one relay retransmitting in Amplify-and-Forward networks under independent Rayleigh slow fading channels. The closed-form expressions of SER for M-PSK and M-QAM modulations are also derived based on Moment Generating Function.

该文从接收端平均误符号率的角度，分析了独立的瑞利衰落信道下，采用放大转发的多中继协同最大比合并检测方案和多节点侦听，单中继转发的机会中继方案的性能；并基于矩生成函数推导出两种方案下M-PSK和M-QAM调制信号平均误符号率的闭合表达式。

This paper discusses the abstract test methods for relay system testing, introduces the model of the R SUT, gives the conceptual architecture of relay system testing, and proposes several abstract test methods.

该文讨论中继系统的抽象测试方法。首先引入被测中继系统模型 R-SUT，然后给出中继系统测试的概念结构，在此基础上提出几种中继系统抽象测试方法。

A grain-state detecting system based on wireless sensor network relates to the application of wireless network, and several sensor nodes are berried in the granary to form the cubic monitor network; coordinating node is mounted in every granary, located in outer of granary; at least one relay network consisting of relay nodes is designed according to the granary, and the position of relay nodes are fixed; information sink node and terminal sever are configured separately, located in control room; the coordinating nodes gather the information collected by several sensor nodes, and send it to the terminal sever by the relay network and information node consisting of relay nodes, the software in terminal sever processes the information, and sends commands to coordinating node to realize the network management for granary.

一种基于无线传感器网络的粮情测控系统，涉及无线网络应用技术，其多数个传感节点有规律的埋入粮仓的粮食中，构成立体监测网络；协调节点每个粮仓设置一个，位于粮仓外部；至少由一个中继节点组成的中继网络是根据粮库的具体情况设计的，每个中继节点的位置固定；信宿节点和终端服务器一对一配置，位于控制室；协调节点汇聚本粮仓多数个传感节点采集的信息，通过中继节点组成的中继网络和信宿节点发送至终端服务器，由终端服务器预装的软件根据信息进行实时处理，发布指令给协调节点，实现粮储工作的网络化管理。

Firstly, based on the two-hop nonregenerative relaying system, an equivalent channel gain model for the two-hop regenerative relaying system is induced. Afterwards, the overall transmit power is allocated to the subcarrier pairs using water-filling approach. Finally, the above conclusions are generalized to the multi-hop relaying system.

首先在2跳非再生中继方式基础上，推导并给出了2跳再生中继方式下的等效信道增益；然后利用注水定理在子载波对间进行功率分配；最后把上述结论推广到多跳中继系统中。

The relay adopts orthogonal frequency division multiplexing for transmission, symbols in the same carriers are forwarded by the relay STBC cooperation, and BF is executed between antennas of the relay.

中继采用正交频分复用传输，相同载波上的符号由不同中继通过空时分组码协作进行转发，同一中继内的天线间进行波束成形。

Multi-loop line number for re-election as relay function: Users can apply for re-election-free relay, a relay incoming number

环路外线多号码连选如中继功能：用户可免申请连选中继，多中继一号码呼入。

This thesis proposes a novel method of retiming E1 signal of the SDH output and using it as a reference synchronization signal for Trunking Gateway. The proposed retiming method can generate the E1 signal of TG input in comply with the maximum relative time interval error requirement of 52.5ns specified in the PRC-Generation standard. The method successfully reduces the E1 signal error level to a smaller margin of 300ns than that of the PRC-output standard.

本论文提出将同步数位阶层输出E1信号做时序重整，做为中继闸道器的做参考同步信号；这样可使输入中继闸道器的E1信号在最大相对时间间隔误差达到主参考时钟产生的52.5奈秒标准；更能让中继闸道器输出的E1信号，由超出同步数位阶层自由振荡4.6微秒，改善到低於主参考时钟输出的300奈秒标准。

DO NOT rag-chew on your local repeater while connected to the reflector.

当本地中继联上互连网中继时，不要在本地中继上神侃。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。