| 摘要 |
<p>A mobile receiver unit (12) of the GPS navigation satellite system is located in accordance with the present invention relative to a reference unit (14) of the same satellite system having known geographic location parameters. Within the frame-work of a cell of a cellular network, a plurality of signals of the respective number of radio sources are received by a MU (mobile unit) and by a reference unit. The differences in time of reception of time related structures of the signals are calculated. The difference between the calculated reception time and the measured reception time of each of the respective signals is used to calculate the distance to the radio sources and to the reference unit. Compensation for radio clock drift is performed when required to radio sources by comparing nominal time related structure transmission rate with measured structure transmission rate as referenced by a satellite signal containing a sequence of time related structures.</p> |
