Method of processing received digitized signals and mobile radio communication terminal device

Patent metadata

Field	Value
Publication number	US-9407490-B2
Application number	US-201414580296-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

A method of processing signals may include receiving a first signal being modulated on a first carrier frequency in a predefined frequency band; measuring a signal level of a received second signal at a frequency higher than the first carrier frequency; and measuring a signal level of a received third signal at a frequency being lower than the first carrier frequency. The method may further include selecting an intermediate mixing carrier frequency from a plurality of intermediate mixing carrier frequencies for processing at least a portion of the received first signal based on the signal level of the second signal and the signal level of the third signal. The method may additionally include performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency.

First claim

What is claimed is:

1. A method of processing signals, the method comprising:
receiving a first signal at a first carrier frequency located in a predefined frequency band;
measuring a signal level of a received second signal at a higher frequency than the first carrier frequency;
measuring a signal level of a received third signal at a lower frequency than the first carrier frequency;
selecting an intermediate mixing carrier frequency from a plurality of intermediate mixing carrier frequencies for processing at least a portion of the received first signal based on the signal level of the received second signal and the signal level of the received third signal; and
performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency.

2. The method of claim 1 , wherein a first intermediate mixing carrier frequency of the plurality of intermediate mixing carrier frequencies is above the predefined frequency band and wherein a second intermediate mixing carrier frequency of the plurality of intermediate mixing carrier frequencies is below the predefined frequency band, and wherein the intermediate mixing carrier frequency is selected from the plurality of intermediate mixing carrier frequencies by comparing the signal level of the received second signal and the signal level of the received third signal.

3. The method of claim 2 , further comprising:
measuring a signal level of a received fourth signal located in a selected frequency band, wherein the selected frequency band is identified as potentially containing spurious interference,
wherein the selecting an intermediate mixing carrier frequency from the plurality of intermediate mixing carrier frequencies comprises selecting one of the first intermediate mixing carrier frequency or the second intermediate mixing carrier frequency or a third intermediate mixing carrier frequency as the intermediate mixing carrier frequency, wherein the third intermediate mixing carrier frequency is equal to the first carrier frequency.

4. The method of claim 3 , further comprising:
measuring a further signal level of the received second signal;
measuring a further signal level of the received third signal;
measuring a further signal level of the received fourth signal,
wherein the further signal levels are measured after performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency;
selecting a different intermediate mixing carrier frequency from the plurality of intermediate mixing carrier frequencies based on the measured further signal level of the received second signal, the measured further signal level of the received third signal, and the measured further signal level of the received fourth signal; and
performing intermediate frequency reception of at least a portion of the received first signal using the different intermediate mixing carrier frequency.

5. The method of claim 1 , further comprising:
measuring a further signal level of the received second signal;
measuring a further signal level of the received third signal,
wherein the further signal levels are measured after performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency;
selecting a different intermediate mixing carrier frequency from the plurality of intermediate mixing carrier frequencies based on the measured further signal level of the received second signal and the measured further signal level of the received third signal; and
performing intermediate frequency reception of at least a portion of the received first signal using the different intermediate mixing carrier frequency.

6. A mobile radio communication terminal device, comprising:
a receiver configured to receive a first signal modulated at a first carrier frequency located in a predefined frequency band;
a first circuit configured to measure a signal level of a received second signal at a higher frequency than the first carrier frequency;
a second circuit configured to measure a signal level of a received third signal at a lower frequency than the first carrier frequency;
a selector configured to select an intermediate mixing carrier frequency from a plurality of intermediate mixing carrier frequencies for processing at least a portion of the received first signal based on the signal level of the received second signal and the signal level of the received third signal; and
a third circuit configured to perform intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency.

7. The mobile radio communication terminal device of claim 6 , wherein a first intermediate mixing carrier frequency of the plurality of intermediate mixing carrier frequencies is above the predefined frequency band and wherein a second intermediate mixing carrier frequency of the plurality of intermediate mixing carrier frequencies is below the predefined frequency band, and wherein the selector is configured to select the intermediate mixing carrier frequency from the plurality of intermediate mixing carrier frequencies by comparing the signal level of the received second signal and the signal level of the received third signal.

8. The mobile radio communication terminal device of claim 7 , wherein the selector is configured to select the first intermediate mixing carrier frequency if the signal level of the received second signal is less than the signal level of the received third signal, and wherein the selector is configured to select the second intermediate mixing carrier frequency if the signal level of the received second signal is greater than the signal level of the received third signal.

9. The mobile radio communication terminal device of claim 7 , further comprising:
a fourth circuit configured to measure a signal level of a received fourth signal located in a selected frequency band, wherein the selected frequency band is identified as potentially containing spurious interference; and
wherein the selector is configured to select an intermediate mixing carrier frequency from the plurality of intermediate mixing carrier frequencies by selecting one of the first intermediate mixing carrier frequency or the second intermediate mixing carrier frequency or a third intermediate mixing carrier frequency as the intermediate mixing carrier frequency, wherein the third intermediate mixing carrier frequency is equal to the first carrier frequency.

10. The mobile radio communication terminal device of claim 9 , wherein the selector is configured to select either the first intermediate mixing carrier frequency or the second intermediate mixing carrier frequency if the measured signal level of the received fourth signal indicates that spurious interference is present in the selected frequency band.

11. The mobile radio communication terminal device of claim 9 , wherein the selector is configured to select the third intermediate mixing carrier frequency if the measured signal level of the received fourth signal indicates that the selected frequency band is substantially free of spurious interference.

12. The mobile radio communication terminal device of claim 6 , further comprising:
a fifth circuit configured to process at least a portion of a received fifth signal at the same time as the portion of the received first signal.

13. The mobile radio communication terminal device of claim 6 , wherein the selector is configured to select the intermediate mixing carr

Assignees

• Intel Corp

Inventors

• Chance Greg
• Tracht Thorsten

Classifications

• H04L27/2672 Primary

  Frequency domain · CPC title

• H04L27/16

  Frequency regulation arrangements · CPC title

• H04B1/16 Primary

  Circuits · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04B1/28 Primary

  the receiver comprising at least one semiconductor device having three or more electrodes · CPC title