Second-Order Optimality of Generalized Spatial Modulation for MIMO Channels with No CSI
Second-Order Optimality of Generalized Spatial Modulation for MIMO Channels with No CSI
复制标题
无CSI的MIMO信道广义空间调制的二阶最优性
DOI：
10.1109/lwc.2015.2475742
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Takeuchi
中科院分区：
文献类型：
--
作者：
S. Zhang;C.-K. Wen;K. Takeuchi;and S. Jin;K. Takeuchi;K. Takeuchi;K. Takeuchi;K. Takeuchi
研究了无信道状态信息（CSI）的瑞利块衰落多输入多输出（MIMO）信道中的广义空间调制（GSM）。在保证相干时间的条件下，证明了在低信噪比条件下，无论同时激活的发射天线数量和接收端是否有CSI，采用正交相移键控（QPSK）的GSM都能获得等于二级以上MIMO信道容量的传输速率。这意味着，就信息理论能量效率而言，QPSK GSM是MIMO信道的二阶最优。
Generalized spatial modulation (GSM) is investigated for Rayleigh block-fading multiple-input multiple-output (MIMO) channels with no channel state information (CSI). Under a condition for coherence time, GSM with quadrature phase-shift keying (QPSK) is proved to achieve a transmission rate that is equal to the capacity of the MIMO channels up to second order in the low signal-to-noise ratio regime, regardless of the number of simultaneously activated transmit antennas and of whether CSI is available at the receiver or not. This implies that QPSK GSM is second-order optimal for the MIMO channels in terms of information-theoretical energy efficiency.