Research on IQ Imbalance Error of Orthogonal Alternating Sampling
In the signal acquisition of complete orthogonal frequency alternating acquisition system, we need to transform the broadband input signal to baseband through analogue orthogonal demodulation. Thus, the IQ imbalance errors will inevitably exist, including amplitude imbalance error and phase imbalanc...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Discrete Dynamics in Nature and Society |
| Online Access: | http://dx.doi.org/10.1155/2022/4812018 |
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| _version_ | 1832558330347782144 |
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| author | Junyi Luo Tao Liu |
| author_facet | Junyi Luo Tao Liu |
| author_sort | Junyi Luo |
| collection | DOAJ |
| description | In the signal acquisition of complete orthogonal frequency alternating acquisition system, we need to transform the broadband input signal to baseband through analogue orthogonal demodulation. Thus, the IQ imbalance errors will inevitably exist, including amplitude imbalance error and phase imbalance error, resulting in distortion deterioration of reconstruction signals. This paper makes an in-depth study on such IQ imbalance errors and mathematically deduces the mathematical expressions of imbalance errors and the spurious frequency distribution caused by them, which shows that the positions where the spurious signals appear are closely related to the frequency of input signal and the tuning frequency of analogue quadrature demodulation. Meanwhile, the amplitude and phase imbalance parameters of the channels I and Q are also calculated. Finally, the spurious effects caused by imbalance errors are verified by simulation experiment, and the verification results are consistent with the theoretical derivation results. |
| format | Article |
| id | doaj-art-92a2196712e8497dbeeeeb84bc1972cb |
| institution | Kabale University |
| issn | 1607-887X |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Discrete Dynamics in Nature and Society |
| spelling | doaj-art-92a2196712e8497dbeeeeb84bc1972cb2025-02-03T01:32:37ZengWileyDiscrete Dynamics in Nature and Society1607-887X2022-01-01202210.1155/2022/4812018Research on IQ Imbalance Error of Orthogonal Alternating SamplingJunyi Luo0Tao Liu1School of Electronic Information and Electrical EngineeringChengdu Kinyea Technologies Co., LtdIn the signal acquisition of complete orthogonal frequency alternating acquisition system, we need to transform the broadband input signal to baseband through analogue orthogonal demodulation. Thus, the IQ imbalance errors will inevitably exist, including amplitude imbalance error and phase imbalance error, resulting in distortion deterioration of reconstruction signals. This paper makes an in-depth study on such IQ imbalance errors and mathematically deduces the mathematical expressions of imbalance errors and the spurious frequency distribution caused by them, which shows that the positions where the spurious signals appear are closely related to the frequency of input signal and the tuning frequency of analogue quadrature demodulation. Meanwhile, the amplitude and phase imbalance parameters of the channels I and Q are also calculated. Finally, the spurious effects caused by imbalance errors are verified by simulation experiment, and the verification results are consistent with the theoretical derivation results.http://dx.doi.org/10.1155/2022/4812018 |
| spellingShingle | Junyi Luo Tao Liu Research on IQ Imbalance Error of Orthogonal Alternating Sampling Discrete Dynamics in Nature and Society |
| title | Research on IQ Imbalance Error of Orthogonal Alternating Sampling |
| title_full | Research on IQ Imbalance Error of Orthogonal Alternating Sampling |
| title_fullStr | Research on IQ Imbalance Error of Orthogonal Alternating Sampling |
| title_full_unstemmed | Research on IQ Imbalance Error of Orthogonal Alternating Sampling |
| title_short | Research on IQ Imbalance Error of Orthogonal Alternating Sampling |
| title_sort | research on iq imbalance error of orthogonal alternating sampling |
| url | http://dx.doi.org/10.1155/2022/4812018 |
| work_keys_str_mv | AT junyiluo researchoniqimbalanceerroroforthogonalalternatingsampling AT taoliu researchoniqimbalanceerroroforthogonalalternatingsampling |