Adaptive receiver for CDMA base stations

US6324160A · kind A · utility

Assignee

• DEUTSCHE TELEKOM AG · DE

Inventors

• Utz Martin · Bensheim, DE
• Thomas Frey · Friolzheim, DE

Key dates

• Filing date: Sep 23, 1998
• Grant date: Nov 27, 2001
• Expiry date: Sep 23, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/709
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An adaptive receiver for base stations of CDMA mobile wireless systems corresponding to the IS-95 Standard. The receiver is designed as an incoherent rake receiver and includes an antenna array. The receiver is capable of analyzing a plurality of components of the same signal transmitted by a mobile station arriving at the antenna array via different propagation paths and from different directions with a time offset. To form virtual antenna directivity patterns for individual rake processing paths, which are adjusted to the directions of incidence of the signal paths to be analyzed, direction signature vectors are calculated and made available to the processing paths together with a signal propagation time that is required for synchronizing the signal components. The direction signature vectors are calculated iteratively from the antenna correlation matrices formed recursively for all possible signal delay times from pulse responses of the antenna arrays. The signal components associated with the processing paths are selected according to the average path powers determined for the individual signal delay times, and the path powers are also calculated from the antenna correlation ma…