发明授权
US07286589B1 Method and apparatus for generation of downlink scrambling code in wideband CDMA mobile devices
有权
用于在宽带CDMA移动设备中生成下行链路扰码的方法和装置
- 专利标题: Method and apparatus for generation of downlink scrambling code in wideband CDMA mobile devices
- 专利标题(中): 用于在宽带CDMA移动设备中生成下行链路扰码的方法和装置
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申请号: US10651848申请日: 2003-08-29
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公开(公告)号: US07286589B1公开(公告)日: 2007-10-23
- 发明人: Karim Nassiri Toussi , Debarag Banerjee , Gokhan Cosgul
- 申请人: Karim Nassiri Toussi , Debarag Banerjee , Gokhan Cosgul
- 申请人地址: US CA Santa Clara
- 专利权人: National Semiconductor Corporation
- 当前专利权人: National Semiconductor Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Merchant & Gould PC
- 代理商 Brett A. Hertzberg
- 主分类号: H04B1/00
- IPC分类号: H04B1/00
摘要:
An initialization method is performed to initialize the states for producing downlink scrambling code for a wideband code division multiple access (WCDMA) mobile device. The initialization method uses an auxiliary linear feedback shift register (x-LFSR) advance the x-initial state to a new initial state that corresponds to a selected downlink scrambling code. The new initial state allows the remaining masks used for generating the downlink scrambling code to be fixed. Memory required to produce the downlink scrambling codes is therefore reduced, as it is no longer dedicated to storing the sets of masks corresponding to each of the possible downlink scrambling codes.