Design of a Radar and Laser Compound Altimeter for Ground Detection

Radar altimeters and laser altimeters are two kinds of altitude detection devices with different performances. The laser altimeter has the advantages of high detection accuracy and strong anti-electromagnetic interference ability, while the radar altimeter is not affected by weather and environment, so it can be used in all weather. Therefore, the compound detection combined the radar altimeter and the laser altimeter is beneficial to improve the detection accuracy and enhance the anti-jamming capability of the system. According to the advantages and disadvantages of the two kinds of altimeters, a radar and laser compound altimeter is designed, the overall composition of the compound altimeter is studied, and the filtering and fusion algorithm of the two kinds of altimeters is proposed. The digital simulation result shows that the accuracy of the altitude detection based on multi-sensors fusion is higher than that of a single sensor, and the stability and reliability of the compound system are stronger. It shows that the compound altitude detection system combined radar and laser altimeter is feasible.