22-06-2012, 05:06 PM
HSDPA IN CDMA SYSTEM USING MODULATION TECHNIQUE
[attachment=25137]
ABSTRACT
3G HSDPA High Speed Downlink Packet Access is an upgrade to the original 3G UMTS cellular system (3.5G) that provides a much greater download speeds for data. With more data being transferred across the downlink than the uplink for data centric applications, the upgrade to the downlink was seen as a major priority. Accordingly 3G UMTS HSDPA was introduced into the 3GPP standards as soon as was reasonably possible, the uplink upgrades following on slightly later. 3G UMTS HSDPA significantly upgrades the download speeds available, bring mobile broadband to the standards expected by users. With more users than ever using cellular technology for emails, Internet connectivity and many other applications, HSDPA provides the performance that is necessary to make this viable for the majority of users.
With the implementation of HSDPA, this technology can coexist on the same carrier as the current Release’99 WCDMA services. This will enable a smooth and cost-efficient introduction of HSDPA into the existing WCDMA networks. The driving force for high data rates are greater speed, shorter delays when downloading audio, video and large files which will be used in PDA’s, smart phones etc. Further a user can download packet data over HSDPA, while at the same time having a speech call.
The proposed method is implementing qpsk modulation
technique HSDPA is based on different technological combinations. The major change in HSDPA than compare to the traditional telecommunication system is the introduction of new transmission channels for the user data, the High Speed (Physical) Downlink Shared Channel, HS-(P) DSCH. The air interface resources available on this channel is shared by multiple users.
[attachment=25137]
ABSTRACT
3G HSDPA High Speed Downlink Packet Access is an upgrade to the original 3G UMTS cellular system (3.5G) that provides a much greater download speeds for data. With more data being transferred across the downlink than the uplink for data centric applications, the upgrade to the downlink was seen as a major priority. Accordingly 3G UMTS HSDPA was introduced into the 3GPP standards as soon as was reasonably possible, the uplink upgrades following on slightly later. 3G UMTS HSDPA significantly upgrades the download speeds available, bring mobile broadband to the standards expected by users. With more users than ever using cellular technology for emails, Internet connectivity and many other applications, HSDPA provides the performance that is necessary to make this viable for the majority of users.
With the implementation of HSDPA, this technology can coexist on the same carrier as the current Release’99 WCDMA services. This will enable a smooth and cost-efficient introduction of HSDPA into the existing WCDMA networks. The driving force for high data rates are greater speed, shorter delays when downloading audio, video and large files which will be used in PDA’s, smart phones etc. Further a user can download packet data over HSDPA, while at the same time having a speech call.
The proposed method is implementing qpsk modulation
technique HSDPA is based on different technological combinations. The major change in HSDPA than compare to the traditional telecommunication system is the introduction of new transmission channels for the user data, the High Speed (Physical) Downlink Shared Channel, HS-(P) DSCH. The air interface resources available on this channel is shared by multiple users.