pooja raju
Ppt of OPTICAL OFDM FOR HIGH SPEED WIRELESS OPTICAL COMMUNICATION
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HIGH SPEED DOWNLINK PACKET ACCESS(HSDPA)

High Speed Downlink Packet Access (HSDPA) is a packet based technology for W-CDMA downlink with data transmission rates of 4 to 5 times that of current generation 3G networks (UMTS) and 15 times faster than GPRS. The latest release boosts downlink speeds from the current end-user rate of 384 kbps (up to 2 Mbps according to standards) to a maximum value according to standards of 14.4 Mbps. Real life end-user speeds will be in the range of 2 to 3 Mbps.

HSDPA provides a smooth evolutionary path for Un ....etc

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High Speed Downlink Packet Access (HSDPA) A Means of Increasing Downlink Capacity in WCDMA Cellular Networks
Abstract:
The increasing demand for capacity in order to provide high data rate multimedia services in wireless environments necessitates enhanced radio transmission techniques and network protocol functionality. Such techniques have to be added to already existing mobile cellular networks, e.g. as provided by EDGE. For 3rd generation UMTS networks based on WCDMA, the High Speed Downlink Packet Access (HSDPA) is being i ....etc

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High Speed OFDM Packet Access (HSOPA) also called as super 3G can be said as the successor of HSDPA and HSUPA technologies specified in 3GPP releases 5 and 6. This expected fraction of 3GPP s Long Term Evolution (LTE) upgrade path for UMTS systems has given a totally different air interface system with that of the W-CDMA. The characteristics of HSOPA includes -: Utilizes 1.25 MHz to 20 MHz bandwidth compared with the 5MHz usage of W-CDMA. The upload and downlink transfer rates is 50 Mbps and 100Mbps and has a spectral efficiency of 2-4 times ....etc

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By
JOSHI G



Abstract

The demand for high-speed mobile wireless communications is rapidly growing.
OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems of the near future. This work presents an investigation into methods for maximizing the spectral efficiency of Orthogonal Frequency Division Multiplexing (OFDM) systems. The current standards such as IEE 802.11a in USA and H ....etc

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High-Speed Downlink Packet Access (HSDPA) (Sometimes known as High-Speed Downlink Protocol Access) is a 3G mobile telephony protocol in the HSPA family, which provides a roadmap for UMTS-based networks to increase their data transfer speeds and capacity. Current HSDPA deployments now support 1.8 Mbit/s, 3.6 Mbit/s, 7.2 Mbit/s and 14.4 Mbit/s in downlink.

Further speed grades are planned for the near future. The networks are then to be upgraded to HSPA Evolved, which provides speeds of 42 Mbit downlink in its first release.

In addition to ....etc

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High Speed OFDM Packet Access

High Speed OFDM Packet Access (HSOPA) also called as super 3G can be said as the successor of HSDPA and HSUPA technologies specified in 3GPP releases 5 and 6. This expected fraction of 3GPP s Long Term Evolution (LTE) upgrade path for UMTS systems has given a totally different air interface system with that of the W-CDMA.

The characteristics of HSOPA includes -:

Utilizes 1.25 MHz to 20 MHz bandwidth compared with the 5MHz usage of W-CDMA.

The upload and downlink transfer rates ....etc

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Prepared by:-
Shrey B. Mathuria




Aim
This presentation aims to analyze the confusion and over sayings surrounding the relative merits of various wireless broadband technologies like WiMAX, EDGE and get to the real reasons that will influence the success of mobile broadband and its ability to deliver broadband for all and everywhere.

Introduction: HSPA

HSPA, the undisputed choice for mobile
broadband
HSPA offers operators a single network for multiple services. ....etc

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http://seminarsprojects.net/Thread-high-speed-ofdm-packet-access-hsopa

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http://seminarsprojects.net/Thread-high-speed-ofdm-packet-access-hsopa?pid=27792&mode=threaded

http://seminarsprojects.net/Thread-high-speed-downlink ....etc

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More Info About HSDPA-HIGH SPEED DOWNLINK PACKET ACCESS

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