Method for detecting and attenuating the impact of interference in a signal of a radio receiver with multiple tuners

Patent metadata

Field	Value
Publication number	US-11979180-B2
Application number	US-202017790615-A
Country	US
Kind code	B2
Filing date	Dec 29, 2020
Priority date	Jan 9, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A method for detecting and attenuating the impact of interference in a signal of a radio receiver with multiple tuners. The method includes providing a first input signal RF 1 to a first tuner T 1 ; simultaneously providing a second input signal RF 2 to a second tuner T 2 ; simultaneously producing a first intermediate high injection signal IFH 1 , by the first tuner T 1 , using the first input signal RF 1 filtered on a first frequency f E , and a first intermediate low injection signal IFB 2 , by the second tuner T 2 , using the second input signal RF 2 filtered on the first frequency f E ; comparing the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 ; selecting one out of the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 to be decoded by the radio receiver.

First claim

The invention claimed is:

1. A method for detecting and attenuating the impact of interference in a signal of a radio receiver with multiple tuners, the method comprising:
a. providing a first input signal radio frequency 1 (RF 1 ) to a first tuner T 1 ,
b. providing a second input signal radio frequency 2 (RF 2 ) to a second tuner T 2 , simultaneously with step a,
c. simultaneously producing a first intermediate high injection signal IFH 1 , by the first tuner T 1 , using the first input signal RF 1 filtered on a first frequency f E , and a first intermediate low injection signal IFB 2 , by the second tuner T 2 , using the second input signal RF 2 filtered on the first frequency f E ,
d. comparing the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 , by:
i. determining a first difference signal between a power spectral density of the first intermediate high injection signal IFH 1 and a power spectral density of the first intermediate low injection signal IFB 2 ,
ii. analyzing the first difference signal, and

e. selecting one out of the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 having the best quality for decoding by the radio receiver.

2. The method as claimed in claim 1 , wherein the first input signal RF 1 and the second input signal RF 2 are acquired by a single antenna A 1 .

3. The method as claimed in claim 1 , wherein step c comprises a subsidiary step consisting in digitizing the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 .

4. The method as claimed in claim 1 , wherein substep ii comprises evaluating the first difference signal.

5. The method as claimed in claim 4 , wherein substep ii comprises evaluating the sign of the first difference signal.

6. The method as claimed in claim 1 , wherein substep ii comprises evaluating the sign of the first difference signal.

7. A motor vehicle radio receiver for implementing the method as claimed in claim 1 , the radio receiver having multiple tuners T 1 , T 2 , the radio receiver comprising at least a first antenna A 1 and a second antenna A 2 and a digital central part for signal processing.

8. A method for detecting and attenuating the impact of interference in a signal of a radio receiver with multiple tuners, the method comprising:
a. providing a first input signal radio frequency 1 (RF 1 ) to a first tuner T 1 , the first input signal RF 1 acquired by a first antenna A 1 ;
b. providing a second input signal radio frequency 2 (RF 2 ) to a second tuner T 2 , simultaneously with step a, the second input signal RF 2 acquired by a second antenna A 2 ;
c. simultaneously producing a first intermediate high injection signal IFH 1 , by the first tuner T 1 , using the first input signal RF 1 filtered on a first frequency f E , and a first intermediate low injection signal IFB 2 , by the second tuner T 2 , using the second input signal RF 2 filtered on the first frequency f E ;
d. comparing the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 ; and
e. selecting one out of the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 having the best quality for decoding by the radio receiver;
f. simultaneously producing a second intermediate low injection signal IFB 1 , by the first tuner T 1 , using the first input signal RF 1 filtered on the first frequency f E , and a second intermediate high injection signal IFH 2 , by the second tuner T 2 , using the second input signal RF 2 filtered on the first frequency f E ;
g. comparing the second intermediate low injection signal IFB 1 and the second intermediate high injection signal IFH 2 ;
steps f and g being executed between steps d and e, step e comprising selecting one out of the first intermediate high injection signal IFH 1 , the first intermediate low injection signal IFB 2 , the second intermediate low injection signal IFB 1 and the second intermediate high injection signal IFH 2 having the best quality for decoding by the radio receiver.

9. The method as claimed in claim 8 , wherein step c is executed at a first instant t1, step f is executed at a second instant t2, the first instant t1 and the second instant t2 being spaced apart by a time interval Δt during which the first input signal RF 1 and the input signal RF 2 are invariant, the time interval preferably being equal to 10 ms.

10. The method as claimed in claim 8 , wherein step c comprises a subsidiary step consisting in digitizing the first intermediate high injection signal IFH 1 and the first intermediate low injection signal IFB 2 , and step f comprising a subsidiary step consisting in digitizing the second intermediate low injection signal IFB 1 and the second intermediate high injection signal IFH 2 .

11. The method as claimed in claim 8 , wherein step d comprises the following substeps:
i. determining a first difference signal between a power spectral density of the first intermediate high injection signal IFH 1 and a power spectral density of the first intermediate low injection signal IFB 2 , and
ii. analyzing the first difference signal, and

wherein step g also comprises the following substeps:
i. determining a second difference signal between a power spectral density of the second intermediate low injection signal IFB 1 and a power spectral density of the second intermediate high injection signal IFH 2 , and
ii. analyzing the second difference signal.

12. The method as claimed in claim 11 , wherein each substep ii comprises evaluating the first difference signal, and the second difference signal, with respect to an interference threshold.

13. The method as claimed in claim 12 , wherein each substep ii comprises evaluating the sign of the first difference signal, and the sign of the second difference signal.

14. The method as claimed in claim 11 , wherein each substep ii comprises evaluating the sign of the first difference signal, and the sign of the second difference signal.

Assignees

• Continental Automotive Tech Gmbh

Inventors

• Lin Chao
• Théry Laurent

Classifications

• H04B1/1027 Primary

  assessing signal quality or detecting noise/interference for the received signal · CPC title

• H04B1/082

  to be used in vehicles (H04B1/086 takes precedence; holding or mounting accessories B60R11/02) · CPC title

• H04B1/28

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

• H04B7/0837

  using pre-detection combining (H04B7/0868 takes precedence) · CPC title