Umts Codes
Umts Codes
Umts Codes
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Synchronisation Codes
Channelisation Codes
Type
256 chips 66.67 s 1 primary code / 16 secondary codes No, does not change bandwidth
4-512 chips 1.04 s 133.34 s = spreading factor 4 ... 256 UL, 4 ... 512 DL Yes, increases bandwidth
38400 chips 10 ms 512 primary / 15 secondary for each primary code No, does not change bandwidth
16,777,216
Spreading
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Usage
UL: to separate physical data and To enable terminals to control data from same terminal locate and synchronise to the cells' main DL: to separate connection to control channels different terminals in a same cell
Separation of terminal
Separation of sectors
UMTS Network UMTS Security 3G Data Speeds UMTS QoS UMTS HSDPA Cell Search Call Setup
UMTS Frequencies UMTS Codes UTRA Time Slots Channel Coding UMTS Handovers Random Access UTRAN Interfaces
UMTS Coding Synchronisation UTRA Channels Media Formats Location Services RCC States Paging
UMTS Link Budget Co-location WCDMA Spreading Compressed Mode UMTS Power Control Iui Frame Structure Virtual Home Environment
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12/7/2010