On the use of pseudorandom codes for "Chirp" radar

The effect of transmit/receive (T/R) switching on the amibiguity function of a radar signal whose complex modulation is long compared to the minimum target delay of interest is investigated theoretically, and the theory is then applied to the specific case on an ionospheric "chirp" sounder. Various pseudorandom T/R codes are compared for their suitability for this particular radar application, and one in particular is shown to have some advantageous properties.