Multipath signal strength indicator
Multipath signal strength indicator
 CN 1,689,256 A
 Filed: 09/22/2003
 Published: 10/26/2005
 Est. Priority Date: 10/15/2002
 Status: Active Application
First Claim
1. be subjected in the communication control processor of the communication channel that multipath signal influences in response, a kind of multipath signal strength indicator comprises:
 Be used to estimate the circuit of the characteristic of described communication channel;
Be used to store the circuit of the nominal characteristic of the communication channel that does not contain multipath signal;
AndBe used to calculate difference between the characteristic of channel of described nominal characteristic and described estimation as the circuit of multipath signal strength.
Chinese PRB Reexamination
Abstract
A multipath signal strength indicator is included in a communications receiver which is responsive to a communications channel subject to a multipath signal. The multipath signal strength indicator includes circuitry for estimating the characteristics of the communications channel and circuitry for storing nominal characteristics of a communications channel free of the multipath signal. Further circuitry calculates the difference between the nominal characteristic and the estimated channel characteristic as the multipath signal strength.

1 Citation
Radio apparatus  
Patent #
CN 111,583,611 A
Filed 09/04/2019

Current Assignee

No References
17 Claims

1. be subjected in the communication control processor of the communication channel that multipath signal influences in response, a kind of multipath signal strength indicator comprises:

Be used to estimate the circuit of the characteristic of described communication channel; Be used to store the circuit of the nominal characteristic of the communication channel that does not contain multipath signal;
AndBe used to calculate difference between the characteristic of channel of described nominal characteristic and described estimation as the circuit of multipath signal strength.


2. in a kind of communication control processor, comprise the multipath equalizer with the adaptive digital filter that contains the tap coefficient source, a kind of multipath signal strength indicator comprises:

The source of nominal coefficient value, described nominal coefficient value corresponds respectively to the tap coefficient that expression does not contain the received signal of multipath signal;
AndBe used to calculate the circuit of the combined size of each difference between described nominal coefficient value and the respective taps coefficient as multipath signal strength.


3. indicating device as claimed in claim 2 is characterized in that, counting circuit comprises the circuit of the difference that is used to produce described nominal coefficient and described tap coefficient.

4. indicating device as claimed in claim 3 is characterized in that, difference generates circuit and comprises a plurality of subtracters that link to each other with the nominal coefficient source with the tap coefficient source.

5. indicating device as claimed in claim 3 is characterized in that, described counting circuit also comprises the circuit of the extent that is used to calculate each described nominal coefficient and described tap coefficient.

6. indicating device as claimed in claim 5 is characterized in that, big or small counting circuit comprises that also a plurality of and described difference generates the absolute value circuit that circuit links to each other.

7. indicating device as claimed in claim 5 is characterized in that, described counting circuit also comprises the circuit of the extent that is used to make up described nominal coefficient and described tap coefficient.

8. indicating device as claimed in claim 7 is characterized in that, described counting circuit also comprises the adder that links to each other with described big or small counting circuit.

9. indicating device as claimed in claim 2 is characterized in that:

Described nominal coefficient value source comprises the register of wherein storing nominal coefficient value in advance;
AndDescribed counting circuit comprises; The subtracter that a plurality of and described tap coefficient source links to each other with described nominal coefficient value source, each subtracter is corresponding to a corresponding tap coefficient, and has the first input end of the described respective taps coefficient of response, second input of response respective nominal values coefficient and the output that produces the difference of corresponding nominal coefficient and tap coefficient; A plurality of absolute value circuits link to each other with more corresponding output in described a plurality of subtracters respectively, and each absolute value circuit produces corresponding extent;
AndAdder has a plurality of inputs that link to each other with described absolute value circuit respectively, is used to make up described extent to produce the signal of expression multipath signal instantaneous strength.


10. indicating device as claimed in claim 9 is characterized in that described counting circuit also comprises the average circuit that links to each other with described adder, and the mean value of combined size that is used to obtain described difference is to produce the signal of the synthetic intensity of expression multipath signal.

11. indicating device as claimed in claim 9 is characterized in that, described counting circuit also comprises:

With the referential number register that described tap coefficient source links to each other, be used to latch one group respectively corresponding to the reference coefficient of described tap coefficient; The a plurality of subtracters that link to each other with described referential number register with described tap coefficient source, each subtracter is corresponding to a corresponding tap coefficient, and have first input end, the response of the described respective taps coefficient of response corresponding with reference to coefficient second input and the output that produces described corresponding difference with reference to coefficient and tap coefficient; A plurality of absolute value circuits that link to each other with the output of more corresponding subtracters in described a plurality of subtracters respectively, each circuit produces corresponding extent;
AndAdder has a plurality of inputs that link to each other with described absolute value circuit respectively, is used to make up described extent to produce the signal of expression multipath signal resistance to vibration.


12. indicating device as claimed in claim 11 is characterized in that, described counting circuit also comprises the peak detector that links to each other with described adder, and the peak value of combined size that is used to keep described difference is with the signal of the peak value resistance to vibration that produces the expression multipath signal.

13. indicating device as claimed in claim 2 is characterized in that, also comprises the indicating device that is used for providing the indication of multipath signal strength to the user.

14. in a kind of communication control processor, comprise the multipath equalizer with the adaptive digital filter that contains the tap coefficient source, a kind of method that is used to produce the signal strength signal intensity indication of multipath signal may further comprise the steps:

Retrieve one group of nominal coefficient value, described nominal coefficient value corresponds respectively to the tap coefficient that expression does not contain the received signal of multipath signal; Calculate the combined size of each difference between described nominal coefficient value and the described tap coefficients value;
AndThe combined size that described difference is provided is as multipath signal strength.


15. method as claimed in claim 14 is characterized in that, also comprises the step of the mean value of the combined size of obtaining described difference as the synthetic intensity of multipath signal.

16. method as claimed in claim 14 is characterized in that, and is further comprising the steps of:

Store one group of tap coefficient as the reference coefficient; Calculate described combined size with reference to each difference between coefficient and the described tap coefficients value;
AndThe resistance to vibration of the combined size of described difference as multipath signal is provided.


17. method as claimed in claim 16 is characterized in that, also comprises the step of the peak value that keeps the dynamic multipath signal strength signal intensity.
Specification(s)