Robust transmit processing for frequency-selective fading channels with imperfect channel feedback
作者： Christof Jonietz , Wolfgang Gerstacker , Robert Schober
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摘要: Reliable channel state information at the transmitter (CSIT) can improve throughput of wireless networks significantly. In a realistic scenario, there is mismatch between CSIT and true channel. The may be outdated due to variations or could erroneous quantization effects. this paper, robust transmit beamforming (rBF) combination time-reversal space-time block codes (TR-STBCs) with rBF, both optimized for transmission over frequency-selective fading channels decision-feedback equalization (DFE), are considered. reliability taken into account design dependent signal processing algorithms achieve robustness against imperfect CSIT. Noisy (quantized) CSIT, cases We show that performance rBF scheme upper lower bounded by BF perfect delay diversity (ODD) without instantaneous respectively. TR-STBC yields significant gains in addition reliable whereas unreliable identical TR-STBC.
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