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找到约 354 项符合 3g 的查询结果

书籍 HSDPAHSUPA+for+UMTS+High+Speed+Radio+Access

The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of 2005 there were 100 open WCDMA networks and a total of over 150 operators having frequency licenses for WCDMA operation. Currently, the WCDMA network ...
https://www.eeworm.com/dl/521927.html
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书籍 Mobile+and+Wireless+Systems+Beyond+3G

With the rapid growth of the wireless mobile applications, wireless voice has begun to challenge wireline voice, whereas the desire to access e-mail, surf the Web or download music (e.g., MP3) wirelessly is increasing for wireless data. While second generation (2G) cellular wireless systems, such as ...
https://www.eeworm.com/dl/521992.html
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书籍 Multicarrier+Techniques+for+4G

At recent major international conferences on wireless communications, there have been several sessions on beyond third generation (3G) or fourth generation(4G)mobilecommunicationssystems,wheremodulation/demod- ulation and multiplexing/multiple access schemes related to multicarrier techniques have d ...
https://www.eeworm.com/dl/522014.html
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书籍 Radio+Resource+Management+Strategies

It is more than a decade since GSM was first commercially available. After some unexpected delay, it seems that finally UMTS is here to stay as a 3G system standardised by 3GPP, at least for another ten years. UMTS will enable multi-service, multi-rate and flexible IP native-based mobile technologie ...
https://www.eeworm.com/dl/522089.html
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书籍 Service Delivery Platforms

Convergence between the two largest networks (Telecom and IP) is taking place very rapidly and at diff erent levels: (1) network level: unifi cation of IP networks with traditional Telecom networks through evolving standards (Session Initiation Protocol (SIP), Realtime Transfer Protocol (RTP), SS7, ...
https://www.eeworm.com/dl/522110.html
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书籍 Software+Defined+Radio+for+3G

Software defined radio (SDR) is an exciting new field for the wireless indus- try; it is gaining momentum and beginning to be included in commercial and defense products. The technology offers the potential to revolutionize the way radios are designed, manufactured, deployed, and used. SDR prom- ise ...
https://www.eeworm.com/dl/522120.html
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书籍 The 3G IP Multimedia Subsystem (IMS)

When 3GPP started standardizing the IMS a few years ago, most analysts expected the number of IMS deploymentsto grow dramatically as soon the initial IMS specifications were ready (3GPP Release 5 was functionallyfrozenin the first half of 2002and completedshortly after that). While those predictions ...
https://www.eeworm.com/dl/522150.html
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书籍 Time-Varying Channels

Wireless communications has become a field of enormous scientific and economic interest. Recent success stories include 2G and 3G cellular voice and data services (e.g., GSM and UMTS), wireless local area networks (WiFi/IEEE 802.11x), wireless broadband access (WiMAX/IEEE 802.16x), and digital broad ...
https://www.eeworm.com/dl/522165.html
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书籍 Wireless Communications & Networking

During the past three decades, the world has seen signifi cant changes in the telecom- munications industry. There has been rapid growth in wireless communications, as seen by large expansion in mobile systems. Wireless communications have moved from fi rst-generation (1G) systems primarily focused ...
https://www.eeworm.com/dl/522200.html
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书籍 Wireless+Networking+Complete

This chapter provides extensive coverage of existing mobile wireless technologies. Much of the emphasis is on the highly anticipated 3G cellular networks and widely deployed wireless local area networks (LANs), as the next-generation smart phones are likely to offer at least these two types of conne ...
https://www.eeworm.com/dl/522213.html
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