The present invention relates to a double-threshold detection method for scanning
radar, belonging to the technical field of
radar target detection. The method comprises the following steps of: the step 1, receiving
radar echo for more than three times; the step 2, performing
down conversion,
pulse pressure and MTD for the current radar echo and then performing modulo to obtain a frequency domainecho; the step 3, determining whether data in the current
frequency domain echo is higher than a second threshold, if yes,
jumping to the step 6, or else,
jumping to the step 4; the step 4, finding out a target point being higher than the first threshold in the current
frequency domain echo; the step 5, performing target trace
point correlation of the target point between the current
frequency domain echo thresholds and the frequency domain echoes twice in the certain threshold range of the speed, the distance and the orientation; the step 6, recording the detected distance, speed and orientation of the target; the step 7, removing the detected target in the frequency domain echo to obtain
noise spectrum; and the step 8, subtracting the
noise spectrum from the frequency domain echo to obtain a target trace point after double-threshold detection. The method provided by the invention can reduce the
noise pedestal and can effectively improve the target detection probability.