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meaning of OVSF codes in UMTS?

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What is the meaning of OVSF codes in UMTS?

posted Apr 20, 2013 by Srinivas Murthy

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1 Answer

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Orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the signal is spread over a wide spectrum range through the use of a user's code. Users' codes are carefully chosen to be mutually orthogonal to each other.

These codes are derived from an OVSF code tree, and each user is given a different, unique code. An OVSF code tree is a complete binary tree that reflects the construction of Hadamard matrices.

answer Apr 20, 2013 by anonymous
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