Abstract: As an advanced communication technology, OFDM plays an important role in the accurate positioning of wireless target node equipment in the wireless base station (BS), but the requirements of signal propagation and arrival time between two wireless devices are relatively high, which makes the application in indoor environment limited. Therefore, based on the known location reference node and BSs transmission, this paper derives the approximate ML position of the target from the collected samples on the target and reference nodes, and proposes an accurate location calculation method of OFDM signal target node based on asynchronous BSs transmission. The proposed method is applied to the existing wireless positioning test system, and the experimental results show that the accurate position calculation method of OFDM signal target node based on asynchronous BSs transmission can accurately locate indoor wireless equipment without any modification of BSs transmission, which has a certain practical significance for the accurate positioning of wireless devices in indoor environment.

Key words: multipath environment, non-synchronous, OFDM, network location