Which of the following statements about fingerprint-based positioning technology are true? (Select All that Apply)

Which of the following statements about fingerprint-based positioning technology are true? (Select All that Apply)
A . The positioning engine generates a virtual fingerprint library through calculations based on the AP deployment and environment information.
B. Terminals learn from each other to form a fingerprint library that can be shared.
C. APs collect surrounding environment information to form a fingerprint library.
D. The fingerprint map is obtained through onsite information collection.

Answer: A D

Explanation:

Fingerprint-based positioning technology is a method that uses the signal strength or phase difference of wireless signals to locate objects. There are two types of fingerprint-based positioning technology: virtual fingerprint-based positioning and real fingerprint-based positioning. In virtual fingerprint-based positioning, the positioning engine generates a virtual fingerprint library through calculations based on the AP deployment and environment information. In real fingerprint-based positioning, the fingerprint map is obtained through onsite information collection.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/fingerprint-based-positioning-techno