@inproceedings{1b9436e3927548019aa92260b01f129e,
title = "An OVSF code tree partition policy for WCDMA systems based on the multi-code approach",
abstract = "Orthogonal variable spreading factor (OVSF) codes for wide-band CDMA (WCDMA) systems have been proposed in the third generation (3G) mobile communications' standard to support services of variable rates. To assign OVSF codes, there are single-code and multi-code approaches. In this paper, the multi-code placement and replacement issue is addressed. We propose a tree partition policy for managing the OVSF code tree to reduce code fragments and the number of code reassignments. Besides, we adjust the multi-code rate according to a unit-based method, which is capable of decreasing the number of code fragments because fewer low-rate codes are utilized. Through extensive simulations, it turns out that the tree partition policy and the unit-based multi-code method jointly perform better than the left-most and crowded-first schemes.",
author = "Ferng, {H. W.} and Chin, {Hao Lun} and D. Shiung and Chen, {Ying Tsung}",
year = "2005",
month = "1",
day = "1",
doi = "10.1109/VETECF.2005.1558120",
language = "English",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1212--1216",
booktitle = "VTC 2005-Fall",
address = "United States",
note = "62nd Vehicular Technology Conference, VTC 2005 ; Conference date: 25-09-2005 Through 28-09-2005",
}