channelization code
DESCRIPTION
gjhjTRANSCRIPT
Purpose of Channelization Code & Scrambling Code in WCDMAPurpose of Channelization Code
Channelization code is used to distinguish different physical channels of one transmitter
For downlink, channelization code ( OVSF code ) is used to separate different physical channels of one cell
For uplink, channelization code ( OVSF code ) is used to separate different physical channels of one UE
For voice service (AMR), downlink SF is 128, it means there are 128 voice services maximum can be supported in one WCDMA carrier;
For Video Phone (64k packet data) service, downlink SF is 32, it means there are 32 voice services maximum can be supported in one
WCDMA carrier.
Purpose of Scrambling Code Scrambling code is used to distinguish different transmitters
For downlink, scrambling code is used to separate different cells in one carrier
For uplink, scrambling code is used to separate different UEs in one carrier
In addition to spreading, part of the process in the transmitter is the scrambling operation. This is needed to separate terminals or base
stations from each other.