| 摘要 |
<p>An array antenna receiver of the code division multiple access system, characterized in that communication signals in a radio band received by receiving circuits provided for a predetermined number of antenna elements and a calibration signal which is subjected to a spread-modulation in the baseband and to frequency conversion into the same radio band as the communication signals and transmitted are multiplexed, the multiplexed radio signals are subjected to frequency conversion into the baseband by a reception processing so as to generate a predetermined number of multiplexed baseband signals, the delay profiles the number of which is equal to that of the receiving circuits are determined by calculating the correlation between each of the baseband signals and a known spread code sequence used by the spread-modulation, the delay profiles are combined by addition when the synchronization timing of the calibration signal included in the multiplexed baseband signals is detected, and path search for each of the thus determined delay profile is carried out.</p> |
