A 4×4 multi-input multi-output (MIMO) orthogonal frequency-division multiplexing (OFDM) modem with onesymbol-locked timing recovery, anti-I/Q mismatch frequency recovery, frequency-dependent I/Q mismatch estimation and adaptive equalization is implemented in 0.13-m CMOS library. This chip occupies 4.6×4.6 mm 2 and consumes 62.8 mW at 1.2 V.I.
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