Markus Stefer

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—In adaptive time division duplex (TDD) broadcast multi-antenna orthogonal frequency division multiplex-ing (OFDM) systems, non-reciprocal transceiver chains at the base station (BS) cause multiuser interference. This is due to the inappropriate spatial filter design at the BS based on the reverse link estimate. Hence, BS transceiver calibration is(More)
—The combination of OFDM with joint pre-processing in adaptive multi-antenna systems offers both an ease of equalization in frequency-selective channels and keeping the signal processing at the mobile stations simple. In addition, the spatial dimension can be efficiently exploited to ensure high system throughput. With the utilization of higher-order(More)
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