第三，改进空中接口，加快接入速度。
无线电空中接口使电耗达到最小“蓝牙”基本技术概要。
WCDMA已经成为了被广泛采纳的第三代空中接口。
WCDMA has been widely adopted as the 3rd Generation air interface.
在移动站和第一基站之间的第一空中接口上建立通信链路。
A communications link is established over the first air interface between the mobile station and the first base station.
EGPRS中采用冗余递增技术，通过空中接口(RF)实现最大效率。
Incremental Redundancy is included in EGPRS to achieve maximum efficiency over the air interface (rf).
根据不同的空中接口标准，SR系统可以减少配置无线通信系统的问题。
The SR system can be applied to reduce problems that come forth in configuring the wireless communication system in accordance with different standard for aerial interfaces.
此外，本文提出的方法适用于不需要改变现有空中接口时隙结构的相关应用。
In addition, it is very important and useful for applications in which the frame structure is predefined and can not be changed.
数字集群系统TETRA提供空中接口加密和端-端加密以实现通信的机密性。
Air interface security and end-to-end encryption a re offered by TETRA to protect data during the entire transmission.
IEEE 802.16标准的空中接口部分主要对物理层和MAC层进行了定义。
The air interface of IEEE 802.16 standard contains specification for physical layer and MAC layer.
本文介绍了一种无中心无线网络系统的空中接口高层协议栈的设计及软硬件实现参考。
This paper provides a reference design of high layer protocol stack for radio interface of centerless and wireless network system.
无线资源控制子层位于空中接口协议栈的第3层，它主要完成无线资源的控制和管理功能。
RRC lies in the 3 rd sublayer of air interface protocol stack, the main function of which is the control and management of radio resource.
能支持功能强大的移动台脱网直通（DMO）方式，可实现鉴权、空中接口加密和端对端加密；
The TETRA system also supports powerful DMO mode and enables authentication, air interface encryption and end-to-end encryption.
讨论了第3代移动通信系统的空中接口安全保护技术，包括数据机密性保护、数据完整性保护。
The air interface security technologies for the protection of data confidentiality and data integrity in 3g are discussed.
分析了TETRA空中接口协议，提出一种基于UML语言开发TETRA协议高层信令的方法。
This paper presents the analyses of TETRA air interface protocol, and then introduces the software implementation method of Tetra network layer protocol use UML.
本文首先对DMR协议进行了分析和研究，尤其是对其空中接口和语音编码技术进行了详细探讨。
Firstly, this paper carries out analysis and research on the DMR protocol, especially its air interface and voice coding techniques.
空中下载技术是一种通过移动通信的空中接口对移动终端内存及SIM卡数据进行远程管理的技术。
Over-the-air technology which download the data of EMS memory and SIM card in mobile station through the air interface of mobile communication present a solution to these challenges.
射频优化是通过调整WCDMA空中接口参数，提高网络的各方面性能，确保网络资源的有效利用。
RF optimization adjusts some air interface parameters to achieve WCDMA network performance upgrade, efficiently utilize network resource.
本文的工作集中在TD-SCDMA空中接口物理层基带信号处理的核心技术：信道的编码和复用。
Work of this paper focus on the core technology , namely Channel Coding and Multiplexing of baseband signal process of radio interface physical layer in TD-SCDMA.
无线资源控制(RRC)子层位于空中接口协议栈的第3层，它主要完成无线资源的控制和管理功能。
RRC lies in the 3rd sublayer of air interface protocol stack, the main function of which is the control and management of radio resource.
定义了一种无线at M空中接口信元格式，设计了无线atM物理层中传输会聚子层信元保护域。
A kind of wireless ATM air interface cell format was defined, and a cell protection field at transmission convergence sub layer of wireless physical layer was designed.
为了满足这种需求，作为TETRA系统核心内容的移动台空中接口协议栈的开发就成为一个重要的研究方向。
For requiration of this service, research of air interface protocol stack of mobile station, as a key point TETRA system, became an important direction.
一个功能，它提供了灵活性在所谓的WCD MA空中接口物理层是使用正交可变扩频因子(OVS f码)码。
One feature that provides flexibility of the so-called physical layer of the WCDMA air interface is the use of Orthogonal Variable Spreading Factor (OVSF) codes.
本文主要讨论了我国电信高速寻呼系统中采用的空中接口协议和联网协议的特点，并介绍协议实现系统功能的方法。
In this article, the characteristics of air interface protocol and networking protocol in high speed paging systems are discussed, and methods for function implementation by them are described.
WCDMA的下一步演进是HSDPA，事实上，3gpp主要从两方面对空中接口作了改进，引入了HSDPA技术。
The next step evolution of WCDMA is HSDPA, as a matter of fact, 3gpp has modified air interface mainly in two aspects, introducing HSDPA technology.
摘要：无线通信领域中，每个无线通信系统都很重视空中接口的安全性，防止非法者监听或是盗用系统的空中无线资源。
Abstract: In wireless telecommunication, in order to protect communication system from monitoring and steal radio resource by illegal intruder, security is a critical issue for any operator.
文章简介了宽带无线接入系统，着重对美国IEEE标准802.16.1系统进行了介绍，给出其系统模型及其空中接口MAC、PHY层协议内容。
This article briefs the broad-band wireless access system, and systematically details the IEEE standard 802.16.1by giving its system model, air interface proto-cols of MAC and PHY layer.
文章简介了宽带无线接入系统，着重对美国IEEE标准802.16.1系统进行了介绍，给出其系统模型及其空中接口MAC、PHY层协议内容。
This article briefs the broad-band wireless access system, and systematically details the IEEE standard 802.16.1by giving its system model, air interface proto-cols of MAC and PHY layer.
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