| 摘要 |
A method of generating an unambiguous correlation function for a TMBOC(6,1,4/33) signal, an apparatus for tracking a TMBOC signal, and a satellite navigation signal receiver system using the same are disclosed herein. The method of generating a correlation function for a TMBOC(6,1,4/33) signal includes generating a delayed signal delayed based on a phase delay with respect to the signal pulse train of a TMBOC(6,1,4/33)-modulated received signal; generating BOC(1,1) partial correlation functions and BOC(6,1) partial correlation functions by performing an auto-correlation operation on the received signal and the delayed signal with respect to the total time; generating a BOC(1,1) sub-correlation function; obtaining a first intermediate correlation function, obtaining second to eleventh intermediate correlation functions, and generating the BOC(6,1) sub-correlation function by summing all the first to eleventh intermediate correlation functions; and generating a main correlation function by combining the BOC(1,1) and BOC(6,1) sub-correlation functions. |
| 主权项 |
1. A delay lock loop (DLL), comprising:
a local signal generation unit configured to generate an early and late delayed signal pair m(t+τ+Δ/2) and m(t+τ−Δ/2), early and late delayed, respectively, based on a phase delay τ and a delay value difference Δ, with respect to a signal pulse train of a TMBOC(6,1,4/33)-modulated received signal m(t); early and late correlation units configured to generate early BOC(1,1) partial correlation functions {Pxα(τ+Δ/2)}x=01 and early BOC(6,1) partial correlation functions {Pyβ(τ+Δ/2)}y=011, and late BOC(1,1) partial correlation functions {Pxα(τ−Δ/2)}x=01 and late BOC(6,1) partial correlation functions {Pyβ(τ−Δ/2)}y=011 by performing an auto-correlation operation on the early and late mixed signal pairs m(t+τ+Δ/2) and m(t+τ−Δ/2) with respect to a total time T(0≦t≦T); early and late BOC(1,1) sub-correlation units configured to generate early and late BOC(1,1) sub-correlation functions S0α(τ+Δ/2) and S0α(τ−Δ/2) by performing an elimination operation on the early BOC(1,1) partial correlation functions {Pxα(τ+Δ/2)}x=01 and {Pxα(τ−Δ/2)}x=01; an early BOC(6,1) sub-correlation unit configured to obtain a first early intermediate correlation function Q0β(τ+Δ/2) by performing an elimination operation on the first and twelfth early BOC(6,1) partial correlation functions P0β(τ+Δ/2) and P11β(τ+Δ/2) of the 12 early BOC(6,1) partial correlation functions {Pyβ(τ+Δ/2)}y=011, to obtain second to eleventh early intermediate correlation functions {Qnβ(τ+Δ/2)}n=110 by performing an elimination operation on the second to eleventh early BOC(6,1) partial correlation functions {Pyβ(τ+Δ/2)}y=110 and the first early intermediate correlation function Q0β(τ+Δ/2), and to generate the early BOC(6,1) sub-correlation function S0β(τ+Δ/2) by summing all the first to eleventh early intermediate correlation functions {Qnβ(τ+Δ/2)}n=010; a late BOC(6,1) sub-correlation unit configured to obtain a first late intermediate correlation function Q0β(τ+Δ/2) by performing an elimination operation on the first and twelfth late BOC(6,1) partial correlation functions P0β(τ−Δ/2) and P11β(τ−Δ/2) of the 12 late BOC(6,1) partial correlation functions {Pyβ(τ−Δ/2)}y=011, to obtain second to eleventh late intermediate correlation functions {Qnβ(τ−Δ/2)}n=110 by performing an elimination operation on the second to eleventh late BOC(6,1) partial correlation functions {Pyβ(τ−Δ/2)}y=110 and the first late intermediate correlation function Q0β(τ−Δ/2), and to generate a late BOC(6,1) sub-correlation function S0β(τ−Δ/2) by summing all the first to eleventh late intermediate correlation functions {Qnβ(τ−Δ/2)}n=010; early and late combination units configured to generate an early main correlation function Rproposed(τ+Δ/2) by summing the early BOC(1,1) sub-correlation function S0α(τ+Δ/2) and the early BOC(6,1) sub-correlation function S0β(τ+Δ/2), and to generate a late main correlation function Rproposed(τ−Δ/2) by summing the late BOC(1,1) sub-correlation function S0α(τ−Δ/2) and the late BOC(6,1) sub-correlation function S0β(τ+Δ/2); and a numerical control oscillator (NCO) configured to determine a phase delay τ for the received signal based on a discrimination output of a discrimination function based on values of the early and late main correlation functions, and to output the determined phase delay τ to the local signal generation unit; wherein the elimination operation is an operation satisfying algebraic relations in which |A|+|B|−|A−B|=0 when real numbers A and B are AB≦0 and |A|+|B|−|A−B|>0 when the real numbers A and B are AB>0. |
