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US 12,696,119 B2Granted
Method and apparatus for calculating signal quality value according to reference signal and signal under test that is derived from predetermined signal processing of reference signal
AssigneeAiroha Technology Corp.
InventorsJeng-Hong Chen, Yun-Xuan Zhang
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Abstract
A signal quality measurement apparatus includes a processing circuit and a signal quality measurement circuit. The processing circuit receives a reference signal from a first circuit and a signal under test from a second circuit, and refers to the reference signal to derive a signal after processing from the signal under test, wherein the signal under test is derived from predetermined signal processing of the reference signal. The signal quality measurement circuit calculates a signal quality value according to the reference signal and the signal after processing.
Claims18
A signal quality measurement apparatus comprising:
- a processing circuit, arranged to receive a reference signal from a first circuit and a signal under test from a second circuit, and refer to the reference signal to derive a signal after processing from the signal under test, wherein the signal under test is derived from predetermined signal processing of the reference signal;
- and
- a signal quality measurement circuit, arranged to calculate a signal quality value according to the reference signal and the signal after processing;
- wherein the reference signal comprises a plurality of first samples at a first sampling rate, the signal under test comprises a plurality of second samples at a second sampling rate that is different from the first sampling rate, and the processing circuit comprises:
- a sampling rate conversion circuit, arranged to perform a sampling rate conversion operation upon the signal under test to generate a re-sampled signal under test, wherein the re-sampled signal under test comprises a plurality of third samples at the first sampling rate;
- and
- a follow-up processing circuit, arranged to derive the signal after processing from the re-sampled signal under test according to the reference signal.
4 more elements
A signal quality measurement apparatus comprising:
- a processing circuit, arranged to receive a reference signal from a first circuit and a signal under test from a second circuit, and refer to the reference signal to derive a signal after processing from the signal under test, wherein the signal under test is derived from predetermined signal processing of the reference signal;
- and
- a signal quality measurement circuit, arranged to calculate a signal quality value according to the reference signal and the signal after processing;
- wherein the reference signal comprises a plurality of first samples at a sampling rate, the signal after processing comprises a plurality of second samples at the sampling rate, and the signal quality computation circuit comprises:
- a matching gain estimation circuit, arranged to find an optimal matching gain for the signal after processing according to the plurality of first samples and the plurality of second samples;
- an adjustment circuit, arranged to apply the optimal matching gain to the plurality of second samples included in the signal after processing, to generate a plurality of gain-adjusted samples, respectively;
- and
- a calculation circuit, arranged to calculate the signal quality value according to the plurality of first samples and the plurality of gain-adjusted samples.
5 more elements
A signal quality measurement method comprising:
- receiving a reference signal from a first circuit and a signal under test from a second circuit, wherein the signal under test is derived from predetermined signal processing of the reference signal;
- referring to the reference signal to derive a signal after processing from the signal under test;
- and
- calculating a signal quality value according to the reference signal and the signal after processing;
- wherein the reference signal comprises a plurality of first samples at a first sampling rate, the signal under test comprises a plurality of second samples at a second sampling rate that is different from the first sampling rate, and referring to the reference signal to derive the signal after processing from the signal under test comprises:
- performing a sampling rate conversion operation upon the signal under test to generate a re-sampled signal under test, wherein the re-sampled signal under test comprises a plurality of third samples at the first sampling rate;
- and
- deriving the signal after processing from the re-sampled signal under test according to the reference signal.
5 more elements
A signal quality measurement method comprising:
- receiving a reference signal from a first circuit and a signal under test from a second circuit, wherein the signal under test is derived from predetermined signal processing of the reference signal;
- referring to the reference signal to derive a signal after processing from the signal under test;
- and
- calculating a signal quality value according to the reference signal and the signal after processing:
- wherein the reference signal comprises a plurality of first samples at a sampling rate, the signal after processing comprises a plurality of second samples at the sampling rate, and calculating the signal quality value according to the reference signal and the signal after processing comprises:
- finding an optimal matching gain for the signal after processing according to the plurality of first samples and the plurality of second samples;
- applying the optimal matching gain to the plurality of second samples included in the signal after processing, to generate a plurality of gain-adjusted samples, respectively;
- and
- calculating the signal quality value according to the plurality of first samples and the plurality of gain-adjusted samples.
6 more elements
Dependencies are inferred from the claim text.