1. A method of generating a correlation function of a composite binary offset carrier (CBOC) signal at a receiver, the method comprising: receiving a CBOC(6,1,1/11) signal at a processor in the receiver; interpreting, by using the processor, a subcarrier pulse period of the CBOC(6,1,1/11) signal as a subcarrier pulse period of a binary offset carrier BOC sin (6,1) signal; combining, by using the processor, partial correlation functions constituting an autocorrelation function of the CBOC(6,1,1/11) signal to generate a correlation function; weighted-combining the correlation function, by using the processor, to generate an unambiguous correlation function of the CBOC(6,1,1/11) signal.