| 摘要 |
<p>The field of locating cellular telephones suffers from high multipath city environments which affect accuracy. This problem can be overcome by a method for determining location by the time difference of arrival, tdoa, of signals from a cellular telephone (21) or other transmitter at cellular based stations (12-14). The method (20) includes determining tdoas for a plurality of channels, averaging the tdoas from the channels, subtracting the average tdoa from the individual channel tdoas to determine residual channel tdoas and determining an overall residual tdoa from the residual channel tdoas. Applications include emergency calls and criminal investigations.</p> |
