Energy-saving receiver assembly for the wireless reception of data

• US 8,953,718 B2
• Filed: 07/08/2011
• Issued: 02/10/2015
• Est. Priority Date: 07/08/2010
• Status: Active Grant

• Current Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Original Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Inventors: Oehler, Frank, Milosiu, Heinrich
• Primary Examiner(s): Flores, Leon
• Application Number:
  US13/808,848
• Publication Number:
  US 20130208831A1
• Time in Patent Office: 1,313 Days
• Field of Search: 375/316, 375/340, 455/130, 455/343.1, 455/343.2
• US Class Current: 375/316
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A receiver assembly for the wireless reception of data that are modulated onto a carrier signal includes an analog receiver, an evaluating device and a control device. The control device controls the receiver by means of sampling pulses such that the receiver is activated during the sampling pulses and is ready to receive transmission signals and is deactivated during the sampling pauses. The evaluating device generates a data bit sequence from the received signals that are supplied by the receiver during the sampling pulses. The control device is further designed to actuate the receiver between phases having differing sampling frequency ranges in dependence on at least one predefined switching criterion.

Claims

1. A receiver assembly for the wireless reception of data that is modulated onto a carrier signal, the receiver comprising:

an analog receiver;

an evaluation device; and

a control device configured to control the receiver with sampling pulses such that the receiver is switched on and is ready for receiving transmission signals during the sampling pulses and is switched off and receives no transmission signals during the sampling pauses, the evaluation device configured to produce a data bit sequence from the received transmission signals delivered by the receiver during the sampling pulses, wherein the control device is further configured to switch over activation of the receiver between phases of sampling pulses with different sampling frequency ranges based on at least one predefined switching-over criterion, and wherein the switch-over criterion is at least one predefined data sequence that is stored in the evaluation device, wherein, when the data bit sequence matches the predefined data sequence, the evaluation device is configured to deliver a switch-over signal to the control device for changing from a first phase of sampling pulses with a first sampling frequency range in which the receiver is prepared to receive the data sequence to a second phase of sampling pulses with a second sampling frequency range in which the receiver receives usable data, the sampling ratio between sampling pulses and sampling pauses in the first phase being between 1;

1,000,000 and 1;

10,000 and in the second phase being between 1;

5,000 and 1;

125.

2. The receiver assembly of claim 1 wherein at least one further predefined data sequence is stored in the evaluation device as a switch-over criterion to a third phase of sampling pulses with a third sampling frequency range.

3. The receiver assembly of claim 1, wherein the switch-over criterion is a predefined time duration that activates a switch-over signal between at least two phases, and wherein the evaluation device or control device is configured to set the predefined time duration.

4. The receiver assembly of claims 1, wherein the control device is configured to control the receiver with sampling pulses having at least a first phase with a first sampling frequency range, a second phase with a second sampling frequency range, and a third phase with a third sampling frequency range, wherein the second sampling frequency range comprises sampling frequencies that are greater than sampling frequencies of the first sampling frequency range, and the third sampling frequency range comprises sampling frequencies that are greater than or equal to sampling frequencies of the second sampling frequency range.

5. The receiver assembly of claim 4, wherein the evaluation device and the control device are designed, after the second phase or selectively after the third phase, to switch over into the first phase, depending on a further switch-over criterion, wherein the further switch-over criterion is a predefined data sequence or a predefined time duration.

6. The receiver assembly of claim 1, wherein the sampling frequency is constant within a phase.

7. The receiver assembly of claim 1, wherein the sampling frequency range of at least one phase comprises variable sampling frequencies.

8. The receiver assembly of claim 1, wherein the receiver is configured to receive data with a bit rate of <

10 kbps.

9. The receiver assembly of claim 1, wherein the sampling frequency of at least one of the phases is determined based on the bit rate of the data modulated onto the carrier signal.

10. The receiver assembly claim 1, wherein the sampling frequency in a first phase lies between 10 and 1000 KHz and in a second phase between 2 kHz and 80 kHz.

11. The receiver assembly of claim 10, wherein at least in a second phase the sampling frequency is at least equal to the bit rate of the data modulated onto the carrier signal.

12. The receiver assembly of claim 11, wherein the second phase of the sampling frequency is a multiple of the bit rate.

13. The receiver assembly of claim 12, wherein the second phase of the sampling frequency is between two and eight times the bit rate.

14. The receiver assembly of claim 1, wherein the sampling ratio between two sampling pulses and sampling pauses in a first phase is 1:

40,000 and in a second phase about 1;

1,250.

15. The receiver assembly of claim 14, wherein the sampling pulses have a duration of 50 ns to 800 ns.

16. The receiver assembly of claim 15, wherein the duration of the sampling pulses is 100 ns for the first phase.

17. The receiver assembly of claim 1, wherein the evaluation device is configured to carry out the evaluation in continuously of each sampling value detected at a switch-on period of the receiver.

18. The receiver assembly of claim 1, wherein the receiver or the evaluation device comprises a comparator which compares the amplitude-modulated received signals delivered during the sampling pulses, to a threshold value, and which forms sampling values.

19. The receiver assembly of claim 1, wherein a settling time of components of the receiver is less than 100 ns.

20. The receiver assembly of claim 1, wherein the receiver comprises a super heterodyne receiver.