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Direct-conversion radio architecture is a low-cost, small-size design for the analog front-end subsystem in a wireless communication transceiver. This architecture, however, induces radio impairments such as I-Q imbalance and dc offset that, along with frequency offset, incur severe degradation in communication performance. This paper aims to improve the performance of estimation and compensation...
Carrier frequency offset estimation in MIMO systems is much more difficult than that in single antenna systems, especially in uplink transmission in a full-multiplexing transmission mode system. That is because in MIMO uplink transmission systems, different mobile nodes use different oscillators (even with different Doppler Shifts), each introducing one unique carrier frequency offset. In addition,...
Semi-blind channel estimation as a combination of the training-based or pilot-assisted method and a pure blind approach is considered to be a feasible solution for practical wireless systems due to its better estimation accuracy as well as spectral efficiency. However, in the existing semi-blind channel estimation techniques, the weighting factor employed to trade off the training-based and the blind...
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