METHOD AND DEVICE FOR SPREAD SPECTRUM DEMODULATION

摘要

PROBLEM TO BE SOLVED: To control reception and to improve reception quality so that a RAKE receiver can be operated with a phase having a maximum correlative level by estimating the correlative level of a multipath component in a transmission signal by connecting a means, with which the change speed of a demodulation path is estimated, to the correlative level retrieving means of a demodulator and performing the phase allocation of the RAKE receiver based on the estimated path change speed. SOLUTION: A received input signal 1 from an antenna is impressed to several spread spectrum demodulating means 2-5. Outputs 6-9 of these demodulating means 2-5 are impressed to a received signal synthesizing means 10 and this means 10 provides the combined signal of a maximum ratio by combining these outputs as a weighted sum. A change speed estimating means 21 provides estimated change speed 22 in a correlative level 13 of the multipath component detected by a correlative level retrieving means 12. This change speed 22 is inputted through an averaging means 23 to a phase allocating means 14 and allocates phases to the demodulating means 2-5.