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REDUCED-COMPLEXITY DOWNLINK (DL) SIGNAL DEMODULATION USING RECIPROCITY REFERENCE SIGNALS FOR MIMO WIRELESS COMMUNICATION SYSTEMS
REDUCED-COMPLEXITY DOWNLINK (DL) SIGNAL DEMODULATION USING RECIPROCITY REFERENCE SIGNALS FOR MIMO WIRELESS COMMUNICATION SYSTEMS
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机译:MIMO无线通信系统中使用对等参考信号的降低复杂度的下行链路(DL)信号解调
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摘要
A method for reducing complexity of downlink signal demodulation in a multiuser (MU) multiple-input-multiple-output (MIMO) wireless communication system includes a base station acquiring uplink (UL) channel state information (CSI) of a MIMO channel between the base station and a user equipment (UE), deriving downlink (DL) CSI from the UL CSI, and transmitting orthogonal frequency-division multiplexing (OFDM) radio subframes using MIMO pre-equalization based on the DL CSI. The UE performs downlink reciprocity correction of the OFDM subframes received from the base station using a single complex phasor estimate and performs downlink data demodulation of the downlink reciprocity corrected OFDM subframes without performing additional MIMO equalization.
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