Detection and direction finding of spread spectrum signals using correlation

In this report a method for detection and direction finding of spread spectrum signals is discussed. The method is based on correlation between two signals which are received by two synchronous spatially separated antennas. The method has been evaluated for direct sequence spread spectrum signals in the high frequency band. Spread spectrum signals have been simulated and added to background noise received in the high frequency band. The spread spectrum has been achieved by BPSK-, QPSK- and MSK-modulation. Calculations in MATLAB have shown that the method works satisfactorily for the BPSK- and QPSK-modulated spread spectrum signals when the Signal-to-Interference Ratio exceeds -20 dB.