Patent attributes
A detector for detecting the presence of Direct Sequence Spread Spectrum (DSSS) signals transmitted in the 2.4 GHz band by a drone aircraft controller to control the flight of a drone aircraft. The detector has a microprocessor that performs autocorrelation analysis of multiple samples of the received DSSS signals and noise present in multiple spaced channels within the 2.4 GHz band to detect consistent correlation peaks which indicate the presence of DSSS signals. The microprocessor also determines the relative strength of the correlation peaks and energizes LEDs generally indicating how close the drone aircraft controller is to the drone aircraft detector. The detector has a first antenna means, a second antenna means, and a receiver and the microprocessor performs time difference of arrival measurements between the signals received by the first antenna means and the second antenna means to determine the general direction of the drone aircraft controller with respect to the drone aircraft detector and the processor displays this general direction utilizing other LEDs on the detector.
