Optimal Waveform Design for Dual-functional Communication-Navigation System

In this paper, we focus on a dual-functional communication-navigation system. First, we consider the ranging accuracy and take Cramer-Rao lower bound(CRLB) as the metrics. Based on the derived CRLB, we analyze the effect of adding the pulse shaping filter on it and the influence of rolloff factor. Moreover, we compare the CRLB of different single-carrier modulation formats. As for communication performance, we consider a case where the maximum transmitting power is the same, which means lower Peak to Average Power Ratio(PAPR) can achieve higher SNR and channel capacity. On this basis, we analyze the PAPR of pulse shaping filters and modulation formats. Considering these two metrics together, we select appropriate pulse shaping filter and modulation formats.