| 摘要 |
PURPOSE: A rake receiver is provided to compare signals outputted according to each demodulator with a set value, to output the signals to a coupler if the signals are bigger than the set value, and to ignore the signals if the signals are smaller than the set value, to delay a signal processing of a correlator as a predetermined time, then to move corresponding branches to other time section to process receiving signals inputted in other multiple path, so as to improve efficiency of a signal processing. CONSTITUTION: Correlators(111,121,131) separate each receiving signal inputted at predetermined time intervals from multiple paths. Demodulators(110,120,130) demodulate original data from the separated signals. Comparators(140,150,160) compare levels of signals outputted from the demodulators(110,120,130) with a predetermined set value, and input compared result values to a variable time delay controller(170). The variable time delay controller(170) transmits a signal outputted from the demodulator(110) of a corresponding path to a coupler(180) according to the inputted compared result values, or ignores the signals of the corresponding path, then delays operations of the correlators(111,121,131) on the corresponding path as a predetermined time. The coupler(180) couples the demodulated signals outputted from the demodulators(110,120,130) to one signal to output the coupled signal. |
