WCDMA系统中的扰码规划

Scrambling Code Planning for WCDMA System

宽带码分多址(WCDMA)系统采用码分多址的无线接入方式,不需频率规划,但需进行相邻小区扰码的规划用以区分各小区。通过WCDMA无线网络的扰码规划,可以确定两个使用相同扰码的小区的复用距离,区分各小区。扰码规划时可采用基于扰码组的规划方法使移动台快速搜索小区。扰码规划的基本原则是:网络中有重叠覆盖的小区不能拥有相同的主扰码。

For a WCDMA system, frequency planning is not required, but scrambling code planning for neighborhood cells is necessary. With scrambling code planning, the multiplex distance between adjacent cells using the same scrambling code can be determined and different cells can be distinguished. The planning method based on scrambling code groups can be adopted for mobile station to quickly search cells. One principle for scrambling code planning is that overlapping cells in a network cannot use the same primary scrambling codes.