Time Domain Analysis of Joint Broadband Radar and Single Carrier Communication in Frequency Division Multiplexing

Radar imaging like airborne synthetic aperture radar (airborne SAR) requires more and more image resolution and therefor high system bandwidth is necessary. Additionally an integrated communication link for friend-foe identification is helpful for the system user. This publication describes therefor the time domain analysis of a joint broadband radar and single carrier communication in frequency division multiplexing (FDM) mode by using an FMCW radar with 2 GHz bandwidth combined with a QPSK communication with a data rate of 0.2 Mbit/s. This includes the successful elaboration of the advantages of this approach over orthogonal frequency division multiplexing (OFDM) regarding the peak to average power ratio (PAPR) and the complementary cumulative distribution function (CCDF). The maximal PAPR of the proposed system is only 6 dB in the simulation approximately and about 6.2 dB in the measurement after high power amplification.