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The accuracy of direction finding using antenna arrays with different array apertures is studied. Numerical simulations are performed using full-wave moment method. The undesirable mutual coupling effect is properly modelled and compensated using receiving-mutual-impedance and the direction finding is obtained using the Matrix Pencil Method. The results show that increasing the number of elements...
A simple and effective simulation model for keyhole multiple-input multiple-output (MIMO) channels is introduced. The keyhole is modeled as a pair of transmitting and receiving antennas relaying multipath signals from the transmitter region to the receiver region. In the separated transmitter and receiver regions, the double-directional radio channel (DDRC) model is used to model the multipath scattering...
An experimental study of direction-of-arrival (DOA) estimation using a compact antenna array is presented. Compared to standard antenna array with a half wavelength element separation, the element separation of the compact array used in this experiment is only a quarter wavelength. As will be demonstrated, the strong mutual coupling effect of this compact array can be almost totally removed by using...
The existence of mutual coupling effect has been well known in the antenna array and array signal processing society. Most work on mutual coupling compensation has been in the area of direction finding and not much work has been contributed to near-field beam focusing and imaging. In this work, the problem of mutual coupling and its effect on a near-field beam focusing application is investigated...
The MIMO capacity for a single cell multiple-input and six outputs multiuser MIMO system is investigated. The channel model consists of an antenna array at each mobile terminal, the Rayleigh fading channel from the user to the base station, and also an antenna array at base station. The channel state information (CSI) is assumed to be always known at the base station, thus successive decoding for...
A wideband mutual coupling compensation method is introduced in this paper. Using the method of system identification in the frequency domain, a multi-input and multi-output (MIMO) compensation network is identified to equalize the frequency-dependent characteristics of array mutual coupling effect. The receiving mutual impedances calculated at discrete sampling frequencies over a wide bandwidth are...
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