| 摘要 |
The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device ( 204, 205, 206 ) for each transmitter ( 201, 202, 203 ), which sends to the computing device ( 208 ) a representation of the signals transmitted only by that transmitter. A cross-correlation of the representation sent back by the mobile terminal ( 207 ) with the representation sent back by the sampling device in the brightest transmitter is performed in the computing device ( 208 ), and an estimate of that brightest signal is subtracted from the representation sent back by the mobile terminal ( 207 ) in order to reduce its effect on the remaining signals as far as possible. The cross-correlation and subtraction steps are iterated until no useful signals remain to be extracted.
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