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What is the actual use of scrambling in telecom and how it is being used for lte ?

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What is the actual use of scrambling in telecom and how it is being used for lte ?
posted Sep 4, 2014 by Harshita

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1 Answer

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Scrambling or scrambling code is used to distinguish different transmitters
In WCDMA
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 LTE we use PCI which is a set of 504 IDs (derived from 3 primary synch sequences and 168 secondary sequences) used to scramble certain downlink transmissions so the UE can distinguish signals from different cells.

answer Sep 4, 2014 by Salil Agrawal
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