AERIAL ACOUSTIC COMMUNICATION FOR LONG-RANGE APPLICATIONS BASED ON SINGLE-CARRIER FREQUENCY DOMAIN EQUALIZATION

Conventional airborne wireless data transmission system is constrained for applications within the distance of ten meters. However, for some applications such as in electromagnetic shielding pipelines, saps, rooms or hallways, the receiver may be located in a certain distance away from the transmitter where both reverberation and background noise need to be considered. An aerial acoustic communication method using transducer arrays is presented for long-range circumstances. Signal-to-noise ratio can be enhanced by the proposed method based on single-carrier frequency domain equalization algorithm. Severe inter-symbol interferences caused by reflected waves of various boundaries can also be reduced. Experimental results carrying out along hallway demonstrated its reliability in the distance expanded to one hundred meters.