Method and radio device for detecting a movement

US8738028B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Heinrich Milosiu · Erlangen, DE
• Frank Oehler · Höchstadt an der Aisch, DE
• Josef Sauerer · Herzogenaurach, DE

Key dates

• Filing date: Sep 6, 2010
• Grant date: May 27, 2014
• Expiry date: Sep 21, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B17/318
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method and a radio device for detecting a movement of at least one receiver, wherein the radio signals are sent from at least one stationary transmitter to the at least one receiver and the received signals are evaluated for determining a movement. The radio signals are designed as a specified bit sequence modulated onto a high-frequency carrier and are demodulated by the receiver to form a receiving sequence that is correlated to determine correspondence with the specified bit sequences stored as a reference sequence. Dependent on the correspondence or errors that can be determined by the correlation, quality indicators for the receiving field strength of the received radio signals are determined, wherein the radio signals having the specified bit sequence are sent from the transmitter having at least two different transmission powers in a series. The series is repeated at temporal intervals and the quality indicators of the received sequences of the series are evaluated to determine a movement of the receiver in relation to the transmitter.