Differential detection unit for the zigbee 802.15.4 standard

US8107513B2 · kind B2 · utility

Assignee

• Atmel Corporation · US

Inventors

• Frank Poegel · Dresden, DE
• Tilo Ferchland · Dresden, DE
• Thomas Hanusch · Dresden, DE

Key dates

• Filing date: May 31, 2006
• Grant date: Jan 31, 2012
• Expiry date: Sep 27, 2028

Classification

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

Abstract

In one embodiment, a detection unit includes a sequence providing unit to provide a third group of derived sequences. The sequence providing unit has a counting unit and multiplexers connected to the counting unit. Fixed values are applied at the inputs of the multiplexers and the sequence providing unit provides the derived sequences of the third group at the outputs of the multiplexers. The third group for each first pseudo noise (PN) sequence has a derived sequence assigned to the first PN sequence. The detection unit includes a correlation unit, which is connected to the sequence providing unit and formed to calculate correlation results by correlating the differentially demodulated signal with each derived sequence of the third group. The detection unit includes an evaluation unit, which is connected to the correlation unit and is formed to derive the values of the data symbols by evaluating the correlation results.