空分多址

这可以说在一定程度上实现了空分多址的思想，因此在实际应用中也会有更好的效果。

To some extent , this kind of algorithms can realize SDMA and thus have better performance .

一种基于码分多址的改进性空分多址性能分析

Performance analysis of an improved SDMA technique based on CDMA

多用户MIMO系统下行链路的空分多址发送预滤波技术研究

A Transmit Preprocessing Technique for Downlink SDMA in Multi-user MIMO Channels

空分多址系统中的快速PDA算法

Fast PDA Multiuser-Detection Algorithm in SDMA System

基于空分多址（SDMA）的多用户波束赋形利用用户间的不同信道特性取得多用户分集增益。

Based on SDMA , multi-user beamforming can achieve multi-user diversity gain from the different channel feature .

自适应阵列天线在近年来被称为智能天线，它能够显著提高系统的信号干扰噪声比（SINR），能够减小时延扩展及多径衰落，实现空分多址。

The smart antenna is able to improve SINR significantly and reduce time delay spread and multipath fading at the same time .

并在我国目前3G移动通信网络完成实验网测试，即将展开大规模商用网建设的大环境下，分析了空分多址在3G网络建设中的应用前景。

The future application of SDMA to 3G network construction is prospected in the circumstance that 3G trial network test has been completed and the commercial network will be constructed on large scale in China .

在基于码分多址（CDMA）和空分多址（SDMA）技术的联合多址系统中，扩频码的分配应根据移动用户空间向量的正交性来进行。

In the joint multiple access systems , which are based on the CDMA and SDMA techniques , the assignment of spreading codes should be based on the orthogonality of the spatial vector of the mobile users .

另一方面，利用智能天线和用户空间位置信息可以实现空分多址（SDMA）接入技术。

On the other hand , utilizing the smart antenna and the users ' spatial information , we can develop the Space Division Multiple Access ( SDMA ) technology .

空分多址（SDMA）技术，即在基站安装多个天线阵元以便从期望用户接收或向期望用户发送数据信息，是有效抑制干扰的技术之一。

Spatial-division multiple access ( SDMA ), by which a plurality of antenna elements are equipped at the base station in order to receive and transmit data information from and to the desired user , has been proposed as an effective technique to suppress interferences .

此方法对蜂窝定位，空分多址系统的实现也有实用价值。

This method may use in the SDMA and cell location system .

空分多址主要包括上行波束成形也包括下行波束成形，上行波束成形由上行链路波束权值生成与上行链路接收信号的分解组成；

The main operations in SDMA include uplink beamforming and downlink beamforming .

空分多址技术中的一些关键技术研究

A Study on Some Key Technology in Space Division Multiple Access System

同时得到了正交波束成形空分多址系统中下行信号-干扰比的分布。

Then the downlink SINR distribution of orthogonal beam-forming SDMA systems is derived .

移动通信中的空分多址技术

Spatial Division Multiple Access Technology in Mobile Communication

基于部分随机波束选择的机会式空分多址技术

Partial Random Opportunistic SDMA with Beam Selection

平衰落信道中的空间特征估计算法及其在空分多址中的应用

Spatial Signature Estimation Algorithm in Flat Fading Channel and Its Application to Space Division Multiple Access

空分多址技术在未来的民用或军用移动通信系统中具有很大的应用潜力。

The SDMA technique has great potential to be applied in the future civilian or military mobile communication system .

智能天线引入空分多址的概念，通过用户空间位置的差异对其进行分离。

The smart antennas receive the space division multiple access concept , differences in spatial location by the user of their separation .

本论文主要讨论个人通信系统中的位置信息和多址技术，特别是空分多址技术。

Thus , the dissertation chiefly deals with the location information and multiplex access technology , especially with the novel SDMA ( space division multiplex access ) technology applied to the rural .

并在此基础上提出了空分多址系统基于有限反馈限制的方法，根据下行信号-干扰比的分布设置信道矢量量化误差阈值、信道增益阈值，实现了信道状态信息反馈的精确控制。

Base on the distribution , a feedback-control scheme for SDMA systems is proposed . The scheme sets thresholds both for quantization error and channel gain to implement the precise control of feedback .

智能天线采用空分多址，利用信号在传播方向上的差别，可以将同频率、同时隙和同码道的信号区分开来，从而可以成倍地扩展通信容量。

Smart antenna adopts SDMA and in terms of the difference of transmission direction , it can distinguish signals of the same frequency , the same time and the same code . Smart antenna can enlarge capacity greatly .

空分TDMA+CDMA多址系统的迟延界分析

Analysis of Delay Bounds of Spatial TDMA with CDMA

近十年来，针对MIMO系统的通信技术，如空时编码、空间复用和空分多址，成为无线通信领域的研究热点并取得很多进展。

In the past decade , techniques for MIMO system , such as space-time coding , spatial multiplexing , and space division multiple access ( SDMA ), have received extensive research and made significant progress .