Wireless networks
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This document provides an overview of wireless and mobile network technologies from 1G to 3G. 1G networks used analog signals and FDMA, but had poor voice quality, battery life, and no security. 2G networks like GSM introduced digital modulation and used TDMA or CDMA, enabling limited data services but unable to support video. 3G networks allow simultaneous voice and data transfer like music and email over the same network, delivering broadband capacity to support more customers at a lower cost than 2G, using technologies like W-CDMA and UTMS.
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Bsnl project
The document discusses the evolution of mobile communication technologies from 1G to 3G. It provides an overview of 1G analog networks, 2G digital networks including GSM and CDMA, and the transition technologies 2.5G and 2.75G. It then focuses on defining 3G as the next generation mobile standard providing multimedia services and broadband data speeds.
lte-wi max
The document provides an overview of the history and evolution of mobile communication technologies from 1G to 4G. It discusses the key characteristics of each generation including 1G which used analog signals for voice calls only, 2G which added digital signaling and SMS, 3G which aimed to provide higher data rates but did not meet expectations, and 4G technologies like LTE and WiMAX that use OFDMA and provide significantly higher broadband speeds. It also covers concepts like MIMO, OFDMA, and SC-FDMA used in 4G networks.
4 g technology
4G networks are projected to provide speeds up to 100Mbps for mobile use and 1Gbps when stationary. 4G standards include LTE and WiMAX and allow the use of multiple technologies like GPS, WLANs, and CDMA simultaneously for integrated wireless solutions. Key features of 4G include higher speeds, lower latency, improved connectivity, and support for multimedia applications.
CDMA Presentation
This document summarizes key aspects of cellular telephony systems and the CDMA technique. It begins by outlining cellular telephony and multiple access techniques like TDMA, FDMA, and CDMA. It then focuses on CDMA, explaining that it uses spread spectrum techniques to allow multiple users to share frequencies simultaneously through encoding with pseudo-random digital sequences. The document outlines the spread spectrum technique used in CDMA and how it transmits and reconstructs data. It concludes by listing advantages of CDMA like high spectral capacity and call quality, and disadvantages such as limitations in international roaming and degradation of audio quality with large numbers of users.
Introduction sur 3G
This document discusses 3G wireless technology. 3G allows for faster data transfer rates compared to previous generations, supporting speeds from 128-384 kbps for mobile devices. It evolved from 2G technologies like GSM. 3G uses CDMA and splits signals into parts, using coding to identify destinations. Main 3G technologies include HSPA, which enables speeds up to 3.6 Mbps, and HSPA+, enabling up to 21 Mbps. To use 3G, a user needs a compatible device, a service provider subscription, and a SIM or data card connected to the provider's 3G network. Disadvantages of 3G include high infrastructure costs, potential health impacts, and initially high service prices.
Sertse 5 g-presentation
5G explanation by sertsedengle shewandagn.
Part 01: Evolution
Part 02: Development
Part 03: Use and Effect
Part 04: Pros and Cons
Part 05: Conclusion
This presentation is prepared for Seminar class towards an MS in computer science at ACT.
lec.1.Mobile Generarions.pptx
Mobile networks have progressed through generations, providing better service with each. The first generation was analog with low speeds and only voice. The second generation (2G) introduced GSM which was digital, added data and SMS, but speeds remained low. The third generation (3G) used CDMA and allowed high speeds, more users, and added video calling. The fourth generation (4G) is LTE, providing very high data rates. The fifth generation (5G) will offer speeds over 1Gbps by combining 4G technologies with next generation internet.
4g technology-sarabjeet chouhan& sunil rajora
This document provides an overview of the evolution of wireless technologies from 1G to 4G. It discusses the key improvements and limitations of each generation, including higher speeds, digital signals, and greater network capacity. 4G is characterized as providing speeds up to 1 Gbps, integration of various wireless technologies, and use of OFDM instead of CDMA. The document suggests 4G will enable new interactive mobile experiences with low latency and provide broadband access for remote locations.
different generation of wireless communication
Mobile telephony has evolved through several generations from early analog systems to current digital technologies. First generation (1G) systems used analog radio signals and were susceptible to noise. Second generation (2G) systems digitized signals but provided slower data transmission speeds. Third generation (3G) systems offered higher speeds and additional capabilities like video calling, web browsing, and mobile TV. 4G systems provide broadband speeds and further multimedia support.
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Welcome to International Journal of Engineering Research and Development (IJERD)
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Wireless networks
- 2. Concepts: Cellular internet access An overview of cellular network architecture 3G Cellular Data Networks Extending the Internet to Cellular subscribers 2
- 3. 1st Generation Technology (1G) It was an analog system Variations in the signals - disrupts over long distances Average between 4800 & 9600 bps It uses FDMA 3
- 4. FDMA 4 •Frequency Division Multiple Access or FDMA is a channel access method used in multiple-access protocols as a channelization protocol. •FDMA gives users an individual allocation of one or several frequency bands, or channels. Multiple Access systems coordinate access between multiple users.
- 5. Drawbacks of 1G Poor voice quality Poor battery life Phone size is big No security 5
- 6. 2nd Generation Technology(2G) It uses GSM GSM provides voice & limited data services and uses digital modulation for improved audio quality Demand for Fax & short messages was growing rapidly 6
- 7. 2G cellular network architecture 7
- 8. 2G technology uses two standards 1. TDMA (Time Division Multiple Access) 2. CDMA (Code Division Multiple Access) 8
- 9. 9
- 10. 10
- 11. Drawbacks of 2G Need to improve transmission quality Unable to support complex data such as video Cell towers has a limited coverage area 11
- 12. 3rd Generation Technology (3G) 3G networks provide the ability to transfer voice data & non-voice data (music, emails & instant messaging) over the same network simultaneously. 3G networks deliver broadband capacity & support greater number of voice & data customers of lower incremental cost than 2G. It uses W-CDMA & UTMS 12
- 14. Thank you 14