A channel state information feedback method for massive MIMO-OFDM
作者： Riichi Kudo , Simon M. D. Armour , Joe P. McGeehan , Masato Mizoguchi
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摘要: Combining multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) with a massive number of transmit antennas (massive MIMO-OFDM) is an attractive way increasing the spectrum efficiency or reducing transmission energy per bit. The effectiveness Massive MIMO-OFDM strongly affected by channel state information (CSI) estimation method used. overheads training frame and CSI feedback decrease multiple access (MAC) increase cost at user station (STA). This paper proposes scheme that reduces length using novel pilot design unitary matrix method. proposed enable point (AP) to estimate signal space all small frames. Simulations in IEEE 802.11n verify performance methods.
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