Detection method and device

US6813258B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Hans · Hildesheim, DE
• Frank Kowalewski · Salzgitter, DE
• Josef Laumen · Hildesheim, DE
• Gunnar Schmidt · Wolfenbüttel, DE
• Siegfried Baer · Pforzheim, DE
• Mark Beckmann · Braunschweig, DE

Key dates

• Filing date: Jan 4, 2002
• Grant date: Nov 2, 2004
• Expiry date: Jan 4, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/70735
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A detection method in which a CDMA-coded data signal is transmitted in the form of a data stream of spread data bursts between a transmitter and a receiver, hierarchical CDMA codes being used for the transmission. In a first step, codes having a smaller spreading factor than a maximally to be detected spreading factor are detected. In a second step, codes having a larger spreading factor than in the previous step are detected, the detection results of the first step being taken into account. In a third step, the detection process is broken off if all codes are detected, or otherwise the second step is repeated with the detection results last obtained in each instance, until all codes are detected.