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The influence mechanism of antenna polarization on channel response is studied, and a modified multiple-input multiple-output (MIMO) channel model including polarization effect is constructed. Some new exact expressions of signal power and spatial correlation coefficient are derived, which include the effect of polarization. The MIMO channel capacity with polarization in different conditions is also...
The performance analysis of multiuser multiple-input multiple-output (MIMO) system with rate-adaptive modulation and antenna selection over Rayleigh fading channels is presented. By means of exact expression of bit error rate (BER), the suboptimal switching thresholds (ST) of fading gain subject to a target BER constraint are derived. It is shown that this suboptimal ST are very close to the optimal...
Based on imperfect channel state information with channel estimation error at the receiver and delayed feedback at the transmitter, a suboptimal power allocation (PA) scheme to minimize bit error rate (BER) under a power constraint is developed for beamforming multi-antenna systems with space-time block coding. The proposed scheme is based on a so-called compressed signal-to-noise ratio criterion,...
In this paper, by combining adaptive modulation and automatic repeat request, a cross-layer design (CLD) scheme for MIMO system with antenna selection (AS) is presented, and the corresponding performance is investigated in Nakagami-m fading channel. Subject to a target packet loss rate and fixed power constraint, the fading gain switching thresholds are derived. According to these results, we further...
By combining adaptive modulation (AM) and automatic repeat request (ARQ), a cross-layer design (CLD) scheme for MIMO system with space-time block coding (STBC) and imperfect channel state information (CSI) is presented in this paper, and the effect of the imperfect CSI on the system performance is investigated. Based on the imperfect CSI, the probability density function of the effective signal to...
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