The Impact of Mutual Coupling on MIMO Maximum-Ratio Combining

Mutual Coupling Effects in MIMO MRC Systems with Limited Feedback

“…We present codebook design techniques for three different measures of transmitter power which have been proposed in the literature, and we investigate the impact of antenna matching on the performance of these codebooks. This work extends our earlier study of the impact of mutual coupling on MIMO MRC systems with full transmitter CSI [10]. Numerical results suggest that, regardless of the power measure and matching networks, the benefits of MIMO MRC with limited feedback can be achieved with transmit antennas spaced as close as 0.2 − 0.3 wavelengths apart.…”

“…We would like to examine MIMO system performance as a function of the transmitted power. As noted in [10], however, several definitions of transmit power have been used in the literature, and each leads to a different performance. We will focus only on the following three transmit power metrics:…”

“…In [10], we assumed the transmitter has full channel state information (CSI) and considered the problem of choosing w to maximize γ(w) subject to the input power constraint p s , p t or p g . In this paper, we assume no CSI is available at the transmitter but there exists a low-rate, error-free, zero-delay, feedback link.…”

MIMO EGT-MRC Scheme in Uplink Frequency Selective Channels with Mutual Coupling

“…Mutual coupling is a phenomenon that a current in one element can induce voltages on the neighbor elements if these antennas are placed close enough to each other. The physical model for this transmitter [7] is shown in Fig. 2.…”

“…In general, mobile terminals have severe constraint in physical size, and then we can't neglect them. In [7], the simulation results of flat fading MIMO channels with MRT-MRC scheme show that the combined impact of mutual coupling and correlation of path gains at the transmitter may influence the system performance significantly.…”