Signal Quality Measurement Based On Transmitter Status

• US 20120224497A1
• Filed: 03/03/2011
• Published: 09/06/2012
• Est. Priority Date: 03/03/2011
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lindoff, Bengt, Wilhelmsson, Leif
• Application Number:
  US13/039,353
• Publication Number:
  US 20120224497A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 1/109 by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver

Abstract

A method of adapting a transceiver includes receiving a signal at a time instant by the transceiver, determining if the transceiver is transmitting at the time instant, selectively updating one two signal quality measurements based on the transmission determination, evaluating a difference between the two signal quality measurements and adapting an operating mode of the transceiver based on the evaluation

Claims

1. A method of adapting a transceiver, comprising the steps of:

receiving a signal at a time instant by the transceiver;

determining if the transceiver is transmitting at the time instant;

selectively updating one of two signal quality measurements based on the transmission determination;

evaluating a difference between the two signal quality measurements; and

adapting an operating mode of the transceiver based on the evaluation.

2. The method of claim 1, wherein a first of the two signal quality measurements is updated if the transceiver is transmitting at the time instant.

3. The method of claim 1, wherein a second of the two signal quality measurements is updated if the transceiver is not transmitting at the time instant.

4. The method of claim 1, wherein determining the transmission at the time instant comprises determining if a transmission power of the transceiver exceeds a predetermined threshold.

5. The method of claim 4, wherein a first of the two signal quality measurements is updated if the transmission power of the transceiver is greater than the threshold.

6. The method of claim 4, wherein a second of the two signal quality measurements is updated if the transmission power of the transceiver not greater than the threshold.

7. The method of claim 1, wherein the signal quality measurements include at least one of signal to noise ratio, signal to interference ratio or a block error rate.

8. The method of claim 1, wherein the evaluation of the difference between the two signal quality measurements comprises comparing the difference with a predetermined signal quality difference threshold.

9. The method of claim 8, wherein adapting an operating mode of the transceiver comprises adapting the transceiver to a high power operating mode or a low power operating mode.

10. The method of claim 9, wherein the transceiver is adapted to a high power operating mode if the difference between the signal quality measurements is greater than the predetermined signal quality difference threshold.

11. The method of claim 1, wherein adapting an operating mode of the transceiver comprises switching the transceiver to a half duplex operating mode.

12. The method of claim 11, wherein the switching to the half duplex operating mode comprises:

releasing connection to a remote node in a full duplex operating mode; and

initiating a setup with the remote node in a half duplex operating mode.

13. A transceiver in a mobile communications terminal comprising:

a low noise amplifier for amplifying weak received signals;

a detector for detecting received signals;

a signal quality estimating module for estimating a received signal quality; and

a control unit for

determining if the transceiver is transmitting at a time instant during which the signal is received;

selectively updating one of two signal quality measurements based on the transmission determination;

evaluating a difference between the two signal quality measurements; and

adapting an operating mode of the transceiver based on the evaluation.

14. The transceiver of claim 13, wherein the control unit updates a first of the two signal quality measurement if the transceiver is transmitting at the time instant and updates a second of the two signal quality measure if the transceiver is not transmitting at the time instant.

15. The transceiver of claim 13, wherein the control unit determines the transceiver is transmitting if a transmission power of the transceiver exceeds a predetermined threshold.

16. The transceiver of claim 15, wherein the control unit updates a first of the two signal quality measurements if the transmission power of the transceiver is greater than the threshold and updates a second of the two signal quality measurements if the transmission power of the transceiver is not greater than the threshold.

17. The transceiver of claim 13, wherein the control unit evaluates the difference between the two signal quality measurements by comparing the difference with a predetermined signal quality difference threshold.

18. The transceiver of claim 17, wherein the control unit adapts the transceiver to a high power operating mode or a low power operating mode.

19. The transceiver of claim 18, wherein the control unit adapts the transceiver to a high power operating mode if the difference between the two signal quality measurements is greater than the predetermined signal quality difference threshold.

20. The transceiver of claim 13, wherein the control unit adapts an operating mode of the transceiver by switching the transceiver to a half duplex operating mode.

21. The transceiver of claim 20, wherein the control unit:

releases connection to a remote node in a full duplex operating mode; and

initiates a setup with the remote node in a half duplex operating mode.

22. The transceiver of claim 13, wherein the control unit adjusts a power level of a power amplifier for a transmitted signal.