This is the power spectral density (PSD) computed for GPS C/A-code of PRN 10. The SatNav Toolbox function CACODE was used to generate the code and the function GPSCOR was used to compute the autocorrelation function. The PSD is the Fourier Transform of the autocorrelation function so the Matlab function FFT helps out nicely. Note that, as theory would predict, the PSD has a null at integer multiples of the C/A-code chipping rate of 1.023 MHz.

Updated: September 2003