发明申请
US20080002797A1 System and Method for Synchronizing Digital Bits in a Data Stream
有权
用于在数据流中同步数字位的系统和方法
- 专利标题: System and Method for Synchronizing Digital Bits in a Data Stream
- 专利标题(中): 用于在数据流中同步数字位的系统和方法
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申请号: US11553983申请日: 2006-10-27
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公开(公告)号: US20080002797A1公开(公告)日: 2008-01-03
- 发明人: Sundar Raman , James M. Brown
- 申请人: Sundar Raman , James M. Brown
- 专利权人: SiRF Technology, Inc.
- 当前专利权人: SiRF Technology, Inc.
- 主分类号: H04L7/00
- IPC分类号: H04L7/00
摘要:
A system and method for synchronizing a receiver of a bit stream to the bit stream include a correlator to remove the PN code modulation and to generate a stream of time sequence values (samples) from the received bits. A plurality of accumulators are included, each accumulator corresponding to an offset in a series of time intervals starting with a first time period. The accumulators add a number of values equal to a number of samples in a bit period. The values added by each accumulator is a set of values starting with the value at the offset corresponding to the accumulator. A plurality of magnitude calculators receives a sum from the corresponding accumulator and calculates a magnitude. A plurality of non-coherent summers are then used to add the magnitudes for each offset in each bit period for all of the received bits. The total sum in each non-coherent summer is then analyzed to find the highest value, such that the offset corresponding to the non-coherent summer with the highest value represents the location of the bit transition in the bit period.
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