Partial response spectral-efficiency modulation in GNSS ranging signals forming application

A. B. Khachaturian, F. V. Ignatiev

Saint – Petersburg state electrotechnical university “LETI”

Received February 1, 2012

 

Abstract. Continuous phase FM with memory proves to be a powerful instrument of enhancing GNSS signal spectral efficiency. It is demonstrated that the partial response CPM is treatable as OQPSK with chip overlapping in each quadrature stream and subsequent envelope normalization. The combination product estimation is done. Spectral characteristics of partial response CPM signal are presented.

Keywords: GNSS, continuous phase modulation (CPM), partial response FM, ranging signal, Walsh expansion.