Optimized transmission scheme for radar using mutually orthogonal complementary codes

摘要

A method comprises transmitting radar pulses encoded with mutually orthogonal complementary sets of code, each set comprising at least a first and second code. Pulses encoded with the first codes are transmitted in a first timeslot and pulses encoded with the second codes are transmitted in a second timeslot. The method further comprises receiving the first and second echoes of the pulses and determining and applying a filter to obtain the separate signals by cross-correlating the received echoes. The filter may be determined specifically by calculating the cross correlations of the first code with the first echo and the second code with the second echo. The calculated cross-correlations corresponding to a same set of codes are summed to obtain respective summed correlation signals. The summed correlation signals may then themselves be summed to obtain the desired filter. An angle-of-arrival algorithm may be applied to the obtained separated signals.