The invention provides an indoor device
positioning system and method. The
system comprises at least two indoor devices and at least four base stations, wherein
clock synchronization is kept among thebase stations; wherein the setting positions of the base stations meet the condition that any four base stations are not located on the same plane, and the indoor device can receive signals transmitted by at least three base stations at any position; wherein the number of the base stations is the minimum number meeting the condition; when the indoor device can receive the signals of the three base stations at present, the current three-dimensional positioning position is determined according to the TOF, and when the indoor device can receive the signals of the at least four base stations at present, the current three-dimensional positioning position is determined according to the TDOA; and the
base station sequentially arranges the received signals, the first
signal is not marked and is not at the
tail position, when the time for
processing the homologous signals last time and the
current time are within a certain duration, the first
signal is moved to the
tail position and marked, and otherwise, the first
signal is processed. According to the scheme, the signal of each indoor device can be processed in time, so that the positioning accuracy is improved.