Research Article
Efficient Joint Estimation and Compensation of CFO, Tx/Rx Frequency-Selective I/Q Imbalance, and the MIMO Radio Channel in OFDM Systems
Table 1
Abbreviations in simulation results.
| Abbreviation | Meaning |
| SCH1 | The closed form based joint estimation scheme in Section 4 | SCH2 | The iterative joint estimation scheme in Section 5 | SEP1 | For SCH1: estimation of using LSE, that is, applying (24) | SEP2 | For SCH1: estimation of using LMMSE, that is, applying (25) | R | For SCH2: apply the real-valued Rx-I/Q-imbalance compensation structure (Section 5.2) | C | For SCH2: apply the complexed valued Rx-I/Q-imbalance compensation structure as in The appendix | INTP1 | For SCH1/SCH2: using the MLE in (28) or (48), respectively | INTP2 | For SCH1/SCH2: using the LMMSE in (29) or (49), respectively | Hsu, S | The scheme in [15], with a preamble of length 800 | Hsu, L | The scheme in [15], with a much longer preamble |
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