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1.发明公开Method and system for resolving the acquisition ambiguity and the problem of false lock in tracking BOC(n, n) modulated signals, particularly for satellite positioning/navigation systems 有权方法和系统，用于解决假Akquisitionsmehrdeutigkeit的问题和BOC（N，N）的跟踪期间捕捉-modulated信号，特别是用于卫星定位/导航系统
公开(公告)号：EP1933469A1
公开(公告)日：2008-06-18
申请号：EP06425828.8
申请日：2006-12-12
Applicant: STMicroelectronics S.r.l.
Inventor： Avellone, Giuseppe , Frazzetto, Maristella , Messina, Ettore
CPC classification number: G01S19/30 , H04B1/7075 , H04B1/7085
Abstract: A method and a system for the acquisition and tracking of BOC (n,n) modulated codes are described, in which a correlation function is locally generated at a receiver terminal using a code w a according to the relationship w a ( τ ) = c ( τ n ) - a ⋅ prn τ n + T c ̸ 2 - prn τ n - T c ̸ 2
wherein c(τ) is a local replica of the BOC modulated pseudo-random noise code with delay τ n , prn(τ) is a replica of a unmodulated pseudo-random noise code, and a is a predeterminable weight coefficient.
Said correlation function is used in an acquisition test function according to the formula x BOC ( n ) - a ⋅ x BOC / PRN ( n + 1 ) - x BOC / PRN n - 1 2
wherein x BOC is the autocorrelation function of the BOC modulated pseudo-random noise code acquired, and x BOC/PRN is the cross correlation function between said acquired BOC modulated pseudo-random noise code and the early and late local replica of the unmodulated pseudo-random noise code, respectively. Said test function is used to recognize a code acquisition, if a value of said test function is higher than a predetermined threshold.Abstract translation: 一种方法，以及用于调制码被描述的BOC（N，N）的捕获和跟踪，其中的相关函数是在接收器终端使用的码WA雅丁到关系WA（A）€‰=€本地产生的系统 ‰C（正） - €‰一个
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