| 摘要 |
PURPOSE:To eliminate interference between multi-paths among other stations by generating a reception signal replica of each mobile station including the multi-path and excluding the replica from the reception signal. CONSTITUTION:Correlation values S1-S3 are obtained by taking correlation between a reception signal R and spread codes (PN codes) of each station to make spread again thereby obtaining re-spread signals S1A1-S3A3. A replica RP is generated by suming the signals of all stations and a difference between the replica RP and the reception signal R is obtained. The correlation between the error signal E and PN codes A1-A3 of each station is taken to correct values S1-S3 to be Si=Si-epsiloni (i=1-3) corresponding to correlation values epsilon1-epsilon3. The replica RP is generated by using the corrected values S1-S3, the operation above is repeated to correct the correlation values so that the error is made zero. Finally when data of the 1st station are obtained, the interference with respect to the signal of the 1st station is excluded by subtracting re-spread signals S2A2, S3A3 of the 2nd and 3rd stations from the reception signal. |
