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Alternate Sampling System Signal Reconstruction Method Based on Rotation Matrix Error Estimation

An error estimation and sampling system technology, applied in the direction of analog-to-digital converters, etc., can solve the problems of large signal error, large amount of calculation, and complicated error estimation process.

Inactive Publication Date: 2017-02-15
CHANGAN UNIV
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a signal reconstruction method for an alternate sampling system based on rotation matrix error estimation, which has simple steps, reasonable design, convenient implementation, and good use effect. Effectively solve the problems of complex error estimation process, large amount of calculation, and large error of reconstructed signal existing in existing parallel alternate sampling system signal reconstruction methods

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  • Alternate Sampling System Signal Reconstruction Method Based on Rotation Matrix Error Estimation
  • Alternate Sampling System Signal Reconstruction Method Based on Rotation Matrix Error Estimation
  • Alternate Sampling System Signal Reconstruction Method Based on Rotation Matrix Error Estimation

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[0059] Such as figure 2 A signal reconstruction method for an alternate sampling system based on rotation matrix error estimation is shown, including the following steps:

[0060] Step 1. Initial parameter input setting: through the parameter input unit 5, input the number M of A / D conversion chips 1 used in the parallel alternate sampling system that needs to be estimated for error, and the sampling of M said A / D conversion chips 1 frequency f s And the bandwidth bps of the sampled broadband signal s(t). The parameter input unit 5 is connected to a data processor 6 .

[0061] Wherein, M is a positive integer and M≥3.

[0062] Step 2, training sample construction: first take the sampling sequences of M described A / D conversion chips 1 in the same time period t, each of the sampling sequences of the A / D conversion chips 1 includes n sampling signals, wherein n =t×f s ; After fast Fourier transforming the M sampling sequences of the A / D conversion chip 1 into the frequency...

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Abstract

The invention discloses a signal reconstruction method of an alternate sampling system based on rotation matrix error estimation, comprising the steps of: 1. Initial parameter input and setting; 2. Training sample construction: taking M A / D conversion chips within the same time period t The sampling sequence, and then perform fast Fourier transform to the frequency domain to obtain M training samples, and the M training samples form the training sample set; 3. Time base error estimation, the process is as follows: error estimation uses dual frequency point selection, covariance Matrix estimation, eigendecomposition, extraction of large eigenvalues ​​and their corresponding eigenvectors, and time base error estimation; 4. Gain error estimation; 5. Gain error compensation; 6. Weight vector reconstruction; 7. Signal reconstruction in the frequency domain; 8. Inverse Fast Fourier Transform. The method of the invention has simple steps, reasonable design, convenient implementation, and good use effect, and can effectively solve the problems of complex error estimation process, large calculation amount, and large error of the reconstructed signal existing in the existing parallel alternate sampling system signal reconstruction method. .

Description

technical field [0001] The invention relates to a signal reconstruction method of an alternate sampling system, in particular to a signal reconstruction method of an alternate sampling system based on rotation matrix error estimation. Background technique [0002] With the continuous expansion of the application range of digital signal processing technology, the frequency bandwidth (referred to as bandwidth) of the signal to be processed is also increasing. In terms of signal bandwidth, signals can be divided into three categories: narrowband signals, broadband signals and ultra-wideband signals. Narrowband signals can be sampled with a single ADC conversion chip in most cases to achieve high precision; under the premise of satisfying the sampling theorem, wideband signals can generally be sampled with a single high-speed ADC conversion chip, but generally the accuracy is low. High-precision sampling cannot be performed, and the use requirements of a large dynamic range can...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 马仑郑暄杨鹏马锐捷
Owner CHANGAN UNIV
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