EFFECT OF IMPERFECT CHANNEL ESTIMATION ON HIGH- RATE SPATIAL MODULATION DETECTORS

Dong Tien Nguyen, Thanh Huyen Thi Le, Nam Xuan Tran

Abstract


Recently, anew Spatial Modulation (SM) system, called high rate spatial modulation (HRSM), was proposed to achieve spectral efficiency linearly increased with the number of transmit antennas. In this system, the HRSM receiver is assumed to exactly know the channel state information (CSI). However, in practice, this assumption is not realistic due to channel estimation error. Furthermore, the spatial correlation between antennas at the transceiver affects on the CSI. As a result, the HRSM performance deteriorates due to the imperfect CSI (I-CSI) and the correlation effect. In this paper, a general channel model including the correlation effect at the transceiver and the I-CSI is proposed. Performance of the existing HRSM detectors is investigated under this model. Besides, in order to obtain comprehensive understanding about the HRSM system, the system capacity under two cases: P-CSI and I-CSI is studied.


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References


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