Patent ID: 6249251
Filing Date: 2001-06-19
Classification: H01Q,H04B

Abstract:
A demodulator for a CDMA adaptive antenna array system comprising:correlators bank means for receiving digital baseband signals of a chip-level received through an antenna array of a base station and computing correlation values with a local code sequence;beamforming means for receiving the digital baseband signals and calculating beamforming weight vectors on the basis of the correlation values of said correlators bank means;beamforming complex multiplying means for a multipath searcher, for receiving the digital baseband signals, performing a complex multiplication for the beamforming weight vector from said beamforming means and the respective signals, and summing up them;searchers bank means for receiving output signals from said beamforming complex multiplying means provided for the multipath searcher, executing a multipath search to output multipath search timing information, and inputting and outputting data from/to said beamforming means for a selection diversity;beamforming complex multiplying means for a finger, for receiving the digital baseband signals, performing the complex multiplication for the beamforming weight vector from said beamforming means and the respective signals, and summing up them;finger bank means for receiving output signals from said beamforming complex multiplying means provided for the finger, executing a multipath tracking on the basis of the multipath search timing information of said searchers bank means, and supplying traced multipath tracking timing information to said correlators bank means; andmultipath-combining means for receiving output signals from said finger bank means, performing a multipath combination for the output signals on a time base, and outputting it.