Locating system and method in light-weight light weight chamber based on channel state information ranging

The invention discloses a locating method in a light-weight light weight chamber based on channel state information ranging, and mainly solves the problems that the prior art is not high in location precision, high in computing cost and timeliness cannot be reached. The method comprises the following realizing steps: 1, dividing an indoor scene into a plurality of loop areas, and selecting reference points at different positions of each loop; 2, continuously acquiring and preprocessing M groups of channel state information at all reference position points by using an OFDM (Orthogonal Frequency Division Multiplexing), so as to complete building an annular fingerprint map and a fingerprint database in an indoor scene; 3, respectively acquiring a distance d between a transmitter and mobile equipment and fingerprints on the mobile equipment; 4, carrying out Bhattacharyya coefficient calculation on the fingerprints on the mobile equipment or a loop of which the semi-diameter is closes to the d in the annular fingerprint map or the fingerprints on the adjacent loop, and obtaining the position of the mobile equipment according to Bhattacharyya coefficients. The locating method provided by the invention has the advantages of being low in expenditure, high in locating precision and strong in timelines, thereby being used for mobile intelligent equipment.