| 摘要 |
A multi-path searcher comprises multiple correlators (Co, C<SUB>1</SUB>, C<SUB>2</SUB>, C<SUB>3 </SUB>. . . C<SUB>N</SUB>) which each process a predetermined scrambling sequence and channelisation code to carry out a correlation measurement on a received pilot signal after it has been delayed by a different time delay (D) at the input of each correlator. Multiple correlation measurements (M<SUB>O</SUB>, M<SUB>1</SUB>, M<SUB>2 </SUB>. . . M<SUB>N</SUB>) are generated and analysed (A) in relation to the time delays to identify the multi-path positions. First candidate multi-path positions are identified over a first predetermined integration period (T<SUB>P1</SUB>) and are stored and compared with second candidate multi-path positions derived from multiple correlation measurements made subsequently by the multi-path searcher over a second predetermined integration period (T<SUB>P2</SUB>) in relation to a first pilot signal. Said first and second candidate multi-path positions are confirmed or rejected to define modified multi-path positions. Said successive predetermined integration periods (T<SUB>P1</SUB>, T<SUB>P2</SUB>) are spaced apart to accommodate one or more similar sets of successive integration periods in an interleaved manner, and the same multi-path searcher is used to determine multi-path positions in relation to the pilot signal received in connection with each of different cells (CELL 1, CELL 2, . . . CELL S). Thus, the multi-path searcher carries out a first correlation cycle (T 1 ) in relation to the pilot signal of each of different cells in succession to determine first candidate multi-paths for each, and then carries out a second correlation cycle (T 2 ) in relation to each of the pilot signals again to determine second candidate multi-paths for each to modify the respective first candidate multi-paths.
|
