 summing a second one of the multiple parts of the first PN-modulated signal with a second one of the multiple parts of the second PN-modulated signal to form a second summation signal.  00. The computer-readable medium of claim 00, further comprising:  program code for generating an In-phase component and a Quadrature component of the first summation signal; and  program code for generating an In-phase component and a Quadrature component of the second summation signal.  00. The computer-readable medium of claim 00, further comprising:  program code for generating a