| 摘要 |
A ranging method (FIG. 7A), executed in a ranging device (FIG. 4), comprises steps of: obtaining a one-way or round trip time of a received wireless signal (FIG. 7A, S701) (e.g. a radar signal or mobile telephony signal) from an object; calculating a statistical value (e.g. standard deviation (SD) based on power spectral density of noise, bandwidth of an IF amplifier, and signal duration) of a rising time of the received wireless signal (FIG. 7A, S702); correcting the trip time according to the statistical value of the rising time (FIG. 7A, S703); and estimating a distance between the object and the ranging device according to the corrected trip time (FIG. 7A, S704). The statistical property depends on parameters which are chosen to minimize the statistical property. This overcomes inaccuracies arising from noise which may be regarded as white Gaussian noise. |
