High-Speed Downlink Packet Access (HSDPA)
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High Speed Downlink Packet Access technology is based on [[Universal Mobile Telecommunications System]] [UMTS] standard that enhances the capabilities of 3G by enabling higher data transfer rates. Since HSDPA is using [[High Speed Downlink Shared Channel]], it has two weak points; variavle spreading factor and fast power control. Therefore, HSDPA implementations includes Multiple-Input Multiple-Output (MIMO), Hybrid Automatic Request (HARQ), fast cell search, Adaptive Modulation and Coding (AMC), and advanced receiver design. | High Speed Downlink Packet Access technology is based on [[Universal Mobile Telecommunications System]] [UMTS] standard that enhances the capabilities of 3G by enabling higher data transfer rates. Since HSDPA is using [[High Speed Downlink Shared Channel]], it has two weak points; variavle spreading factor and fast power control. Therefore, HSDPA implementations includes Multiple-Input Multiple-Output (MIMO), Hybrid Automatic Request (HARQ), fast cell search, Adaptive Modulation and Coding (AMC), and advanced receiver design. | ||
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=== Multiple-Input Multiple-Output === | === Multiple-Input Multiple-Output === | ||
Revision as of 07:26, 12 April 2009
High Speed Downlonk Packet Access is a 3.5G [G stands for generation] technology. HSDPA, short for High Speed Downlink Package Access is a new new mobile telephony protocol, which allows to have high data speed transmission and large amounts of capacity. It will provide download speed on a mobile phone same as an Asymmetric Digital Subscriber Line [ADSL]. HSDPA can archieve data transmission Speed of 8-10 Mbit/s. For future improvement, HSDPA provides up to 42Mbit/s data transmission speed.
Contents |
Technology
High Speed Downlink Packet Access technology is based on Universal Mobile Telecommunications System [UMTS] standard that enhances the capabilities of 3G by enabling higher data transfer rates. Since HSDPA is using High Speed Downlink Shared Channel, it has two weak points; variavle spreading factor and fast power control. Therefore, HSDPA implementations includes Multiple-Input Multiple-Output (MIMO), Hybrid Automatic Request (HARQ), fast cell search, Adaptive Modulation and Coding (AMC), and advanced receiver design.
Multiple-Input Multiple-Output
Adaptive Modulation and Coding
Hybrid Automatic Request
Packet Scheduling
Usage
Testing
Comparison
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