The technologies of set-card separation and OTA (Over the Air) are both the important measures in mobile communication systems to realize the separation of the wireless services and terminals.
移动通信中手机的机卡分离技术和空中激活技术是实现电信服务与电信终端相分离的重要途径。
In the third mobile communication systems, access security includes the confidentiality of the subscriber identity, entity authentication and the security of data.
在第三代移动通信系统中，接入安全主要包括身份保密、实体认证和数据的安全三个方面。
With the development and maturity of network and wireless communication technology, the study of wireless mobile network application in control systems is becoming a hotspot.
随着网络技术和无线移动通信技术日趋成熟，无线移动网络在控制系统中的应用也成为研究热点。
With the advent of multi-channel mobile telephone systems, intermodulation interferences will become increasingly high, often resulting in serious impairments on communication.
随着多频道共用移动电话系统的出现，互调干扰将日趋严重，以致使在一定范围内严重影响通信。
This paper mainly analyzes three user detection approaches in digital cellular mobile communication systems based on CDMA.
着重分析了在码分多址（CDMA）数字蜂窝移动通信系统中的三种用户检测技术。
A person trained in this field may need to know how to set up and maintain telephone equipment, voicemail systems, fiber optic and microwave communication links, as well as mobile radio equipment.
在这个方面受过训练的人可能要知道如何和维护电话设备、语音信箱系统、光纤和微波通信线路，以及移动通信设备。
In MEO satellite mobile communication systems, the confirmation of cell dwell duration' s distribution is very important to constitute handoff str ategies properly.
在MEO卫星移动通信系统中，确定小区驻留时间分布对于合理地规划切换策略具有十分重要的意义。
Connection migration in mobile agent systems is to support continuous and transparent communication operations between mobile agents.
移动代理系统中连接的迁移机制可用来支持移动代理之间连续透明的通信。
In 3g mobile communication systems, main services are multimedia data services, of which the traffic is seriously asymmetric between uplink and downlink.
在3g移动通信系统中，主要业务是上下行速率严重不对称的多媒体数据业务。
A mobile communication systems robustness in case of a location-database failure is improved without the need for periodic location update operations.
无需终端的周期性位置更新操作，即可使移动通信系统获得对位置数据库的容错能力。
The inter-cell interference is an inherent problem in cellular mobile communication systems.
小区间干扰是蜂窝移动通信系统中的一个固有问题。
In a type of mobile communication systems, data transmits through two notes, GSN and PCU. Some delays and interruptions occur because of the wireless link.
在一类移动通信系统中，信息传输过程中经过GSN和PCU两个节点，由于无线链路的不稳定，产生了延时和断健。
In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.
在CD MA移动通信系统中，多址接入干扰可以通过多用户检测技术来消除，而分集接收可以减小信道衰落的影响。
One of the main problems faced by future mobile communication systems is the rapid increase in the demand for wideband services and applications.
下一代无线通信所要面对的一个主要问题就是：对于宽带服务和应用迅速增长的需求。
A new receiver structure was proposed for adaptive smart antennas in CDMA mobile communication systems, requiring only the knowledge of the desired user's pseudo noise (PN) code sequence.
利用码分多址(CDMA)系统中的用户伪随机(PN)码信息，提出了一种新的自适应智能天线结构。
Multi-Code technique is widely used in the third generation mobile communication systems, and flexibly provides high-rate packet data services for users.
多码道技术广泛地应用于第三代移动通信系统，灵活地为用户提供高速分组数据业务。
The distributed power controls are practically significant technologies applied in the practical mobile communication systems.
分布式功率控制技术是移动通信系统中具有实用意义的功率控制技术。
The next generation wireless communication systems are expected to provide higher data rate and better quality of service in order to support the multimedia service in the complex mobile environment.
下一代无线通信系统要求能够在复杂的移动环境下提供更高的传输数据速率和更好的服务质量，以满足人们对多媒体业务日益增长的需求。
This antenna is simple in structure and small in size, and can be conveniently integrated in various mobile communication systems.
该天线结构简单，尺寸小，便于集成在多种移动通信系统中。
The next generation mobile communication systems aim at providing higher quality and data rate transmission at the minimum lost (power, bandwidth or complexity ) in finite wireless resource.
下一代移动通信的目标是以最低的代价（带宽、功率、复杂度）为日益扩大的用户群提供更加可靠、高速的宽带数据业务。
Providing positioning service for mobile users is a basic function in future mobile communication systems.
为移动用户提供定位业务是今后移动通信系统必备的基本功能。
The new transmitter designed by this paper can be used in 2G/3G mobile communication system, Fixed Broadband Access Systems, Wireless LAN and so on.
基于陆地的宽带固定无线接入系统可以较低的成本提供宽带综合业务，促成本地通信的竞争，成为国际上的热点。
Power control is a key technique in CDMA cellular mobile communication systems. It can combat near far effect, reduce multiple access interference and improve the system capacity.
功率控制技术是CD MA系统克服“远—近效应”，降低多址干扰、增大系统容量的一项关键技术。
In this paper, we investigate the Constrained Weighted Least Squares (CWLS) algorithms for Time Difference of Arrival (TDOA) based mobile user location in wireless communication systems.
本文主要对无线定位中基于TDOA的一种约束加权最小二乘算法进行了研究。
So the two technologies become key ones for high data rate, performance and capaticity in 3G mobile communication systems and beyond.
目前，这两种技术已经成为第三代以及未来移动通信系统实现高速率、高传输质量、高系统容量的关键技术之一。
So the two technologies become key ones for high data rate, performance and capaticity in 3G mobile communication systems and beyond.
目前，这两种技术已经成为第三代以及未来移动通信系统实现高速率、高传输质量、高系统容量的关键技术之一。
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