A kind of keyless systems localization method based on bluetooth RSSI

The invention provides a kind of keyless systems localization method based on bluetooth RSSI, it is characterised in that first, tentatively judges that key is in the car or outside car；In-car external space coordinate system is set up, if four base stations are separately mounted to the four sides center of automobile, after automobile intelligent key receives the signal intensity that four base stations are issued, first each intensity are contrasted, judges key in which quadrant；By signal intensity, key is obtained to the distance of four base stations according to in-car attenuation model, and then judge that key is in the car or outside car；According to key in the car or outside car, using in-car decay neural network model or free space attenuation model, the distance of key after being corrected to four base stations；Secondary weighted barycenter split fix algorithm is recycled to position key position.The method that the present invention is provided substantially increases the positioning precision of intelligent vehicle key.