35results about How to "Good anti-interference characteristics" patented technology

The invention discloses a DLP signal receiving system suitable for laser radar and an adaptive adjustment method thereof. A laser transmitter emits a laser signal through a laser scanning mirror to form a laser scanning area, and a DLP signal receiver controls the laser scanning area. Scanning points for signal acquisition, the DLP signal receiver includes a plurality of DLP micromirrors arranged in an array, and the laser reflection signal of each scanning point is tracked by more than one corresponding DLP micromirror in the array of DLP micromirrors and receiving; the laser transmitter is integrated with the DLP signal receiver, or the laser transmitter is adjacent to the DLP signal receiver; the DLP micromirrors arranged in an array are used to track and receive the laser radar synchronously The laser reflection signal in the scanning area controls the deflection of the DLP micromirror array to synchronize with the lidar scanning, and selectively projects the area imaged by the scanning target reflection signal to the photoelectric sensor, thereby improving the signal of receiving the laser reflection signal in the scanning area of ​​the lidar Noise ratio, while achieving better anti-interference characteristics.

The invention provides a method for detecting underwater weak and small targets, which relates to the field of signal processing, uses the feature layer information fusion method to map the feature quantity into the same high-dimensional space, realizes classification, and detects through the classification results. The invention uses chaos theory Accurately describe and realize the feature extraction of the target signal and nonlinear components in the environmental noise, effectively avoid the interference of random components in the environmental noise, use the chaotic features in the signal for signal detection, which can significantly reduce the minimum detection signal-to-noise ratio and improve the detection probability. The random resonance method converts random noise energy into signal energy, improves the detection ability of weak targets, and can also highlight the nonlinear components contained in the signal. The classification method of the fusion center can eliminate false alarms and missed detections in a single node. etc. are separated from the correct detection results to further increase the detection probability and improve the effectiveness and reliability of weak and small target detection at sea.

The present invention relates to a tag antenna that solves the problem of densely placed interference, which includes: the antenna body is in a rectangular shape, and the first hollow part includes: a first sub-hollowout part, a second sub-hollowout part and a third sub-hollowout part, the first sub-hollowout part Both the first sub-hollowout and the third sub-hollowout are parallel to the wide side of the antenna body, the second sub-hollowout is parallel to the long side of the antenna body, and the tail end of the first sub-hollowout is connected to a tail end of the second sub-hollowout. connection, the tail end of the third sub-hollow part is connected to the other end of the second sub-hollow part; Both the hollowed-out part and the sixth sub-hollowed-out part are parallel to the wide side of the antenna body, the fifth sub-hollowed-out part is parallel to the long side of the antenna body, and the tail end of the fourth sub-hollowed-out part is connected to a tail end of the fifth sub-hollowed-out part, The tail end of the sixth sub-hollow part is connected with the other tail end of the fifth sub-hollow part.