A system and method for detecting unknown signals that may be radar pulses is presented. The method includes conjugate multiplying a first signal with a second signal to produce a first multiplied signal and conjugate multiplying the second signal with a third signal to produce a second multiplied signal. The first and second signals are orthogonal and the second and third signals are orthogonal. The radar pulse is contained in all three signals but each signal has noise components. The first multiplied signal is integrated to produce a first integrated signal and the second multiplied signal is integrated to produce a second integrated signal. The first and second integrated signals are summed to produce a summed signal. A location of a peak power of the summed signal is then detected. A TOA of the of the radar pulse is then detected based on the location of the peak power.