专利检索 ap:("Jacob Schelm" OR "Ophir Shabtay" OR "Yaniv Avital" OR "Ehud Reshef") AND inv:"Jacob Schelm" 第 1 页

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发明授权
Multipath channel tap delay estimation in a CDMA spread spectrum receiver 失效

公开(公告)号：US07061967B2

公开(公告)日：2006-06-13

申请号：US10179645

申请日：2002-06-24

申请人： Jacob Schelm , Ophir Shabtay , Yaniv Avital , Ehud Reshef

发明人： Jacob Schelm , Ophir Shabtay , Yaniv Avital , Ehud Reshef

IPC分类号： H04B1/707

CPC分类号： H04B1/70775 , H04B1/70757 , H04B1/7113

摘要： A method and apparatus for estimating channel tap delays of multipath components in a CDMA received signal. The search for the tap delays are split into two phases namely, a phase 1 and a phase 2 search. The phase 1 search is a coarse resolution quick search adapted to generate a rough estimate of the location of the tap delays. During this phase, the candidate codes are summed and the input signal correlated with the code sum creating an ambiguity in the code associated with the multipath. A finer resolution slower phase 2 search resolves the code ambiguity present in the initial rough estimates of the phase 1 search. Additional phase 2 correlations may be performed to implement a code-tracking loop.