METHOD FOR GENERATING UNAMBIGUOUS CORRELATION FUNCTION FOR CBOC(6,1,1/11) SIGNAL BASED ON MULTI STAGE COMPOSITION OF PARTIAL CORRELATION FUNCTIONS, APPARATUS FOR TRACKING CBOC SIGNALS AND SATELLITE NAVIGATION SIGNAL RECEIVER SYSTEM

摘要

A method for generating a correlation function of a CBOC(6,1,1/11) signal according to the present invention comprises the following steps of: generating a first correlation function by performing a first eliminating operation for a pair of first and twelfth partial correlation functions among 12 partial correlation functions constituting an autocorrelation function of a CBOC(6,1,1/11) received signal; generating a fourth correlation function by performing the first eliminating operation for a second correlation function and a third correlation function which are generated by performing a second eliminating operation for two differential functions between a sixth partial correlation function and a seventh partial correlation function with the first correlation function respectively; and obtaining a main correlation function by performing the first eliminating operation for each of the 12 partial correlation functions and the fourth correlation function or adding resulting waveforms generated by performing the first eliminating operation for each of eight partial correlation functions excluding the sixth and seventh partial correlation functions among the 12 partial correlation functions and the fourth correlation function. The first eliminating operation for real number A and B means that an operation of¦A¦+¦B¦-¦A-B¦is conducted, and the second operation for real number A with B means that an operation of¦A+B¦-¦A¦is conducted.