The invention discloses an indoor positioning method based on channel 
response frequency domain and airspace combined 
processing. The method comprises the following steps: discretizing a positioning area in an indoor environment and generating a plurality of reference points in an offline stage; enabling the mobile terminal to move at a 
constant speed at each reference point, acquiring channel information in two mutually perpendicular directions, preprocessing the acquired data, extracting corresponding 
fingerprint characteristics from the acquired data, and establishing an offline 
database byutilizing a relation between fingerprints in the mutually perpendicular directions; collecting the 
signal data of an unknown motion terminal in the online positioning stage, extracting the online 
fingerprint information, matching the 
fingerprint information of a to-be-tested terminal with fingerprints in an offline 
database, calculating the position of the to-be-tested terminal according to the 
similarity criterion, and outputting the position information of the to-be-tested terminal through the offline 
database and completing the indoor positioning. Rapid positioning of a target is realized,and the positioning time is effectively reduced. Position 
estimation is carried out by using a WKNN 
algorithm, so that more accurate positioning is realized.