Introduction to Technical Seminar on High speed Downlink Packet Access (HSDPA):

HSDPA is 3rd generation mobile telephony communication protocol in the HSPA (high speed packet access).It can support speed up to 7.2 megabit per sec. In real life we can receive speed up to 3 mega bits it’s very useful for mobile television users. If you want to use the HSDPA you have to buy a phone which can support speed of 3 megabit per sec and support different services with respect to WCDMA is wide code division multiple access provide physical channel which support high peak data rates. It increases transmissions of data with CDMA.

Orthogonal frequency division multiplexing (OFDM) is used to encode the data which is on multiple carrier frequencies. It’s used in wide band digital communication (WDM) in wireless communication with copper wires (like: television and audio broad casting and 4th generation mobile communication. The main advantage of OFDM in single carrier is to handle several channels but condition is that for suppose narrowband interference, attenuation of high frequency without filter. Orthogonality allow high spectral efficiency with nyquist rate (nyquist rate is the twice of the highest frequency).

High Speed OFDM Packet Access (HSOPA stand for):

OFDM packet access has very high speed and called as the successive part of HSDPA or HSUPA .It’s the 3rd generation. The uploading and down linking is possible up to 1.25 Mhz to 20 Mhz bandwidth comparison with 5 MHZ usage power is possible WCDMA .HSPOA has different services like voice, high speed and other interactive application with large data transfer feature.

Although UMTS gives long with HSDPA and HSUPA provide high data transfer rates and wireless data usage  has competition from state of the art technology  including the WiMAX has forced the UTMS to build their network with the HSOPA that provides with largest data speeds, and spectral efficiency thus providing way for more features and extra functionality. The cost is very low for gradation to setting up a new network.

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