An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel
It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive estimation and compensation, to mitigate the combined effects of I/Q imbalance and...
| Main Authors: | , |
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| Format: | Conference Paper |
| Published: |
IEEE Computer Society
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/30564 |
| _version_ | 1848753124576067584 |
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| author | Haq, K. Chung, Kah-Seng |
| author_facet | Haq, K. Chung, Kah-Seng |
| author_sort | Haq, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive estimation and compensation, to mitigate the combined effects of I/Q imbalance and multipath channel on the received signal. Estimation of the channel and I/Q imbalance parameters is performed in time domain using a training sequence. Based on the estimated I/Q imbalance and channel parameters, signal compensation are performed in the frequency domain. Computer simulations have shown that the proposed scheme is effective in mitigating the combined effects of I/Q imbalance and multipath fading for QPSK and 16-QAM modulation. The Symbol Error Rate (SER) achieved for the compensated 16-QAM signal is 10-4, at an SNR of 20dB, which is the same for ideal 16-QAM signal, at an SNR of 19dB. |
| first_indexed | 2025-11-14T08:19:32Z |
| format | Conference Paper |
| id | curtin-20.500.11937-30564 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:19:32Z |
| publishDate | 2013 |
| publisher | IEEE Computer Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-305642017-09-13T15:32:48Z An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel Haq, K. Chung, Kah-Seng It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive estimation and compensation, to mitigate the combined effects of I/Q imbalance and multipath channel on the received signal. Estimation of the channel and I/Q imbalance parameters is performed in time domain using a training sequence. Based on the estimated I/Q imbalance and channel parameters, signal compensation are performed in the frequency domain. Computer simulations have shown that the proposed scheme is effective in mitigating the combined effects of I/Q imbalance and multipath fading for QPSK and 16-QAM modulation. The Symbol Error Rate (SER) achieved for the compensated 16-QAM signal is 10-4, at an SNR of 20dB, which is the same for ideal 16-QAM signal, at an SNR of 19dB. 2013 Conference Paper http://hdl.handle.net/20.500.11937/30564 10.1109/APCC.2013.6766009 IEEE Computer Society restricted |
| spellingShingle | Haq, K. Chung, Kah-Seng An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title | An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title_full | An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title_fullStr | An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title_full_unstemmed | An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title_short | An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel |
| title_sort | adaptive approach to mitigate the effects of i/q imbalance and multipath channel |
| url | http://hdl.handle.net/20.500.11937/30564 |