| 摘要 |
To implement a CDMA receiving apparatus having a good reception quality and low power consumption. A delay profile using a desired constraint length is generated by a delay profile generating unit (11) from received signal wave-form data recorded on a received signal wave-form buffer unit (4). Several demodulation paths are selected at peak position of the delay profile by the path search unit (12). Demodulation symbols which are generated from received signal wave-form data of each demodulation path by the channel demodulating unit (14) are brought into in-phase by an adjustment angle which is obtained by the channel estimating unit (13). If the reception quality which is measured by the reception quality measuring unit (16) is lower than a predetermined value for a combined demodulation symbol which is path combined by RAKE unit (15), the combination of said selected demodulation paths or the constraint length is changed to repeat the demodulation operation of the same received signal wave-form data. The power to the radio unit (3) and the received signal wave-form buffer unit (4) is turned on with the timing of receiving stand-by information, which is counted by the wake-up counter (5) . |
