The invention discloses a ground-based
broadcasting type locating method. Ground-based
broadcasting stations are built in a located area,
code division multiple access modulation is carried out on information of identification codes, the
longitude, the
latitude, the elevation and the
clock of the ground-based
broadcasting stations, the ground-based broadcasting stations continuously send the processed information of the identification codes, the
longitude, the
latitude, the elevation and the
clock of the ground-based broadcasting stations, the information is transmitted to an onboard
receiver of an aircraft through an L band, and the onboard
receiver receives the information sent by the ground-based broadcasting stations, and carries out
frequency conversion and
demodulation on the information to obtain the identification codes, the
longitude, the
latitude and the
clock, wherein the identification codes, the longitude, the latitude and the clock are contained in the information sent by the ground-based broadcasting stations; comparison between the
signal receiving moment of the onboard
receiver and the information, obtained through
demodulation, of the clock is carried out, the distance between the aircraft and the corresponding ground-based broadcasting
station is calculated, and then the position of the aircraft is obtained through calculation. According to the ground-based broadcasting type locating method, anti-interference performance of signals is good, accurate locating and accurate navigation of the aircraft can be achieved, and the ground-based broadcasting type locating method has the advantages of being all-weather, high in accuracy, low in cost, easy to achieve, good in real-time performance, multipurpose and the like.