A power antenna without relay box cannot be used with this unit. 没有中继盒的电源天线不能和本机一起使用。
Successors may take unequal shares if an agreement to that effect is reached among them. community antenna relay service 继承人协商同意的,也可以不均等。共用天线中继业务同用天线中继业务
High Performance Antenna for Microwave Radio Relay Communication 微波中继通信高性能天线
This paper simply introduces the key technologies applied in TD-SCDMA, such as joint detection, smart antenna, dynamic channel allocation, uplink synchronization, relay handover, etc. 简要介绍了TD-SCDMA系统所应用的联合检测、智能天线、动态信道分配、上行同步技术及接力切换等关键物理层技术。
The antenna coordinate of the user satellite is defined and the tracking laws from the user satellites to the TDRS are derived according to the requirement of the TDRSS ( Tracking and Data Relay Satellite System). 根据中继卫星系统中用户星跟踪中继卫星的要求,定义了用户星天线坐标系,推导出了用户星天线对中继卫星的跟踪规律。
The Antenna Pointing Control Strategy Study of Tracking and Data Relay Satellite 中继卫星天线指向控制策略研究
Abstract In this paper, it is proposed, on the basis of author's previous theory and practice work, to reform the classical Cassegrain antenna which is widely used in microwave relay station in our country. 本文在作者已经获取的理论与实践成果基础上,提出对我国微波中继站现行广泛应用的经典卡塞格伦天线进行技术改造的意见。
This antenna has many advantages such as low cost, compactness, light weight, flexible scanning, and being easily conformal with mobile carrier surface. So it is fit for the antennas of relay communication satellite and mobile ground terminal of satellite communication. 该天线具有成本低、体积小、重量轻、波束扫描灵活、易于与移动载体表面共形的特点,特别适合于中继通信卫星和卫星移动通信的地面移动终端上。
This paper deals mainly with the project of high performance antenna with only sub-reflector modified and simple step dual mode conical horn as feeder source, and its practicable results have already achieved on antennas of microwave relay communication system. 本文主要介绍仅修正副面,并以简单的台阶双模圆锥喇叭为馈源的高性能天线方案及其在微波中继通信天线上所取得的实用性结果。
Cooperative communication adopts the antenna of other users in a communication network as relay to achieve transmit diversity of virtual antenna, thus improving system performance. It has found wide application in both civil and military communications. 协同通信利用通信网中其它用户的天线作为中继,实现“虚拟天线”的空间传输分集,从而提高系统性能,它在民用与军事通信应用中有广阔的应用前景。
For the reason that the antenna number of the relay node is only half the total number of single-antenna users which means the antenna num-ber of the relay node is less than the total number of users, beamforming at cancelling intra-group interference is no longer applicable. 由于中继天线数目只为单天线用户总数的一半,中继天线数目小于用户总数,因此旨在消除组间干扰的波束成形方案不再适用。
MIMO relay chan-nels, which combines the multiple antenna system and the relay, can improve the spectral efficiency of relay network. MIMO中继技术结合了多天线系统和中继技术的优点,进一步提高了中继系统的频谱效率。
Cooperative communication is a new kind of space diversity, multiple mobile terminals with single antenna relay information for each other, thus the space diversity is formed, and the capacity of the system will be increase. 协作通信是一种新的空间分集技术,多个单天线移动终端共享彼此的天线,实现空间分集,提高系统的容量。
Relay system can be divided into multiple models from a single antenna and multi-antennas division, or from a single relay and multi-relays division, or from the single user and multi-users criterion. 从单天线和多天线方面划分,从单中继和多中继方面划分,从单用户和多用户方面划分,中继转发系统可以划分成多种模型。
This paper sums up the main work with following points: ( 1) The dissertation investigates the development process of the standard of TD-SCDMA and analyses intelligent antenna, dynamic channel allocation, relay switch and so on. 本文的主要工作归纳为以下几点:(1)调研了TD-SCDMA的标准发展历程并且对智能天线、动态信道分配、接力切换等关键技术进行了分析。
Under this communication scheme, each node is equipped with only a single antenna and can use the antennas on other ( relay) nodes to achieve the spatial diversity. 在这种模式下,每个节点只安装了一根天线,但是它可以使用网络中其它节点(中继节点)上的天线为自己传输数据,从而达到空间分集效果。
Finally, the equivalent relationship between the antenna spacing and slant angle is revealed. ( 3) Generally, the antenna of relay is lower than that of the base station, and higher than that of the mobile station. 最后推导了天线倾角与天线间距的等效关系。(3)中继信道统计特性研究:中继天线一般低于基站天线,高于移动台天线。
Unlike MIMO, cooperative relay communication system has no required to antenna amounts of the transmitter. To achieve space diversity, the cooperative relay communication system forms the virtual MIMO with the idle network nodes, so it can improve the reliability of the information transmission. 与MIMO不同的是,协作中继通信系统并不要求发射端安装多个天线,而是通过系统中的其他空闲节点作为中继形成一个虚拟的MIMO系统,从而实现空间上的分集,提高信息传输的可靠性。
In addition, MMSE IC iterative group detection combined with power allocation among different antenna layers can further improve the system performance. Secondly, distributed generalized low-density codes are proposed for the clustered cooperative relay networks. 此外,MMSEIC迭代群检测算法结合天线层之间的功率分配也可进一步改善系统性能。其次,针对成簇的协作中继网络,提出基于分布式广义低密度码的协作传输方案。
Splash plate antenna is a kind of dual reflector parabolic antenna, which is mainly used in satellite communications, microwave relay communications and other fields. 溅散板馈源天线属于双反射面后馈的方式实现的抛物面天线,主要应用于卫星通信,微波中继通信等领域。