Reducing Blocking Probability of 3G Mobile Communication System Using Time Multiplexing NOVSF Codes

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Provided by: International Journal Of Engineering And Computer Science
Topic: Mobility
Format: PDF
Orthogonal Variable Spreading Factor (OVSF) codes have been proposed for the data channelization in W-CDMA access technology of IMT-2000. OVSF codes have the advantage of supporting variable bit rate services which is important for emerging multimedia with different bandwidth requirements. OVSF codes are employed as channelization codes in W-CDMA. Any two OVSF codes are orthogonal if and only if one of them is not a parent code of the other. Therefore, when an OVSF code is assigned, it blocks entire ancestor and descendant codes from assignment because they are not orthogonal to each other.
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