Method for transmitting a digitized message of little information depth

• US 20060018376A1
• Filed: 06/06/2005
• Published: 01/26/2006
• Est. Priority Date: 12/05/2002
• Status: Active Grant

• Current Assignee: EnOcean GmbH
• Original Assignee: EnOcean GmbH
• Inventors: Schmidt, Frank
• Granted Patent: US 7,570,703 B2
• Time in Patent Office: Days
• US Class Current: 375/239
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 14/026 using pulse time characteristics modulation, e.g. width, position, interval
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation

Abstract

A method for transmitting a digital message of little depth of information such as, e.g. measured values of sensors by transmitters, for example wireless sensors with little power reserves, in which the data are transmitted in pulses and each transmitted pulse transmits the data with a data transmission rate of more than 100 kbit per second. To further optimize the transmission method, the information content of an individual transmitted pulse is increased by time- or position-coding.

Claims

1. A method for transmitting a digitized message of little depth of information in a power-saving manner by transmitters with limited power reserves in an environment of periodic radio interferences sources, wherein the message is transmitted in pulses and several times and each transmitted pulse transmits the message with a data transmission rate which is at least of such a magnitude that the length of the transmitted pulse in time is shorter than the length in time between the periodic disturbances and wherein the period between two transmitted pulses differs from integral multiples of a period of the periodic radio interference sources.

2. The method as claimed in claim 1, wherein a message of the same content is transmitted at least a second time, the period between the transmitted pulses being predetermined and/or randomly selected.

3. The method as claimed in claim 2, wherein the period between the transmitted pulses differs from integral multiples of interference signal periods of, for example, radio interference sources typically to be expected, within a range of the signal pulses.

4. The method as claimed in claim 2, wherein the period between the transmitted pulses differs from 16 to 20 ms and/or 125 μ

s.

5. The method as claimed in claim 1, wherein any coding of an individual transmitted bit is more than two-valued.

6. The method as claimed in claim 5, wherein the coding of an individual transmitted bit to be more than two-valued is given by a time- and/or position-coding.