Space-time array processing based on ultrawideband throb signal

Advanced radar and radio communication systems employ space-time array processing to improve performance in terms of detection, resolution, and interference rejection. In this paper, we present the principle of space-time array processing based on ultrawideband (UWB)-throb signal. Analogous to the well known (delay-Doppler) ambiguity function, a space-time resolution (STR) function is derived and analyzed, by computer simulations, for different signal and array parameters, i. e., pulse width, throb rate, array interelement spacing, and number of array sensors. The structure of the STR function is composed of a narrow mainlobe and low-level sidelobes located on the temporal-angular plane. Antenna energy patterns generated from the STR function clearly demonstrate the dependence of angular resolution on the various signal and array-design parameters. The trade-offs between the various design parameters for achieving high-angular resolution as well as high-temporal resolution are attractive in practice.