Patent ID: 8488412

Claim:
An underwater detection device, comprising: a transceiver module for transmitting underwater an ultrasonic pulse signal that is frequency-modulated and receiving an echo signal corresponding to the transmitted signal; a pulse compression module for pulse-compressing the signal received by the transceiver module and outputting a signal pulse-compressed; a suppression range determining module for determining a suppression range where a range side lobe suppression process is performed for the pulse-compressed signal; an echo determining module for determining whether the data of the pulse-compressed signal at each depth corresponds to a range side lobe; a suppression value determining module for determining a suppression value for the data of the pulse-compressed signal at each depth; a suppression conducting module for performing a calculation to suppress the range side lobe based on the suppression value for the data determined to be data of the pulse-compressed signal corresponding to the range side lobe by the echo determining module among a plurality of data of the pulse-compressed signals that fall into the suppression range; and a display processing module for generating a signal for display based on the signal outputted from the suppression conducting module to display a generated signal as detected information.