Accurate frequency estimation from five samples

Now, Yuichi; Inomoto, Kenji; Kuno, Kazuhiro

doi:10.1016/1051-2004(92)90013-o

Digital Signal Processing

1992

DOI: 10.1016/1051-2004(92)90013-o

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Accurate frequency estimation from five samples

Yuichi Now

Kenji Inomoto

Kazuhiro Kuno

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Cited by 3 publications

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Synchronous averaging for asynchronous sampling data

Noro¹,

Kuno²

2007

Electrical Engineering Japan

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SUMMARYThe progress of digital audio technology has enabled the familiar use of products such as CD and DAT in acoustic measurement. For example, a signal reproduced with a CD player is inputted into a subject for measurement and a DAT recorder records its response. However, the sampling cannot be synchronized completely with the input signal, although both nominal sample rates are set up equally, because the player and recorder work independently. The most popular solution is to use software to perform the synchronous addition after converting the recorded signal into the original sampling rate. However, the rate conversion also has an error due to the windowing in the highfrequency region of the processed signal. This paper proposes a new method for averaging asynchronous sampling data to solve these problems. To evaluate performance, the transfer function of only measuring equipment estimated from asynchronous sampling data was compared with the measurement results in synchronous sampling conditions. Both results agreed within 0.1 dB, so the effectiveness of the new method was confirmed. In measuring the frequency response of a BPF when white noise is introduced, the proposed method was compared with the method using rate conversion. As a result, the noise reduction was almost the same, and the processing time was reduced to about onefourth.

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Synchronous averaging for asynchronous sampling data

Noro¹,

Kuno²

2007

Electrical Engineering Japan

Self Cite

View full text Add to dashboard Cite

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Frequency Estimation from Few Measurements

Adelson

1997

Digital Signal Processing

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Synchronous Averaging for Asynchronous Sampling Data

Noro

Kuno

2005

IEEJ Trans.EIS

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The progress of digital audio technology enabled the familiar use of the products such as CD and DAT in the acoustic measurement. For example, a signal reproduced with CD player is inputted into a subject of measurement and DAT recorder records its response. However, the sampling cannot be synchronized completely with the input signal although both nominal sample rates are set up equally, because player and recorder work independently. It is the most popular software solution to perform the synchronous addition after converting the recorded signal into the original sampling rate. However, the rate conversion also has the error due to the windowing in the high frequency region of processed signal. This paper proposes a new method for averaging asynchronous sampling data to solve these problems. To evaluate performance, the transfer function of only measuring equipment estimated from asynchronous sampling data was compared with the measuring result in synchronous sampling condition. Both results agreed within 0.1dB, so the effectiveness of new method was confirmed. In measuring the frequency response of BPF under injecting white noise, the proposed method was compared with the method using rate conversion. As a result, the noise reduction was almost the same, and the processing time was reduced to about 1/4.

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Accurate frequency estimation from five samples

Cited by 3 publications

References 4 publications

Synchronous averaging for asynchronous sampling data

Synchronous averaging for asynchronous sampling data

Frequency Estimation from Few Measurements

Synchronous Averaging for Asynchronous Sampling Data

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