| 摘要 |
PROBLEM TO BE SOLVED: To provide a rake receiver capable of suppressing a drop call at the time of handover by quickly detecting a signal from a moving destination base station even at the time of high speed moving. SOLUTION: Searchers 2a to 2c inversely diffuse a digital signal from an A/D converter 1 and demodulate it by respectively using the diffusion code of a class indicated from a controlling part 5 and the timing of inverse diffusion and notifies these demodulation results to the controlling part 5. A mobile speed deciding means 5a decides the speed of a mobile communication terminal device in accordance with mobile speed information detected by a speed detection circuit in the searcher 2a. A searcher controlling means 5b performs ON/ OFF control of the searchers 2a to 2c in accordance with the speed decided by the means 5a. A forgetting coefficient controlling means 5c switches and controls the value of a forgetting coefficientαin accordance with a speed decided by the means 5a and enhances sensitivity to signal intensity from the base station of a moving destination. |
