Survey on Solving OVSF Code Assignment Approach

This survey paper is based on the OVSF (Orthogonal variable spreading factor) code assignment approach used in WCDMA. The orthogonal property of this code leads to some problems such as code blocking, call blocking and so on. This paper presents various schemes used in OVSF code to avoid code blocking problems. This analysis provides various problems occur in OVSF code during transmission. Keywords-3G network, code blocking,OVSF code,UMTS,WCDMA

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