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Multi-cell MIMO technique theoretically promises large improvement in spectral efficiency and fairness in cellular networks and is regarded as the key enabling technique for solving the troublesome issue of inter-cell interference. To evaluate its practical performance in the cellular network, we have implemented the real-time downlink multi-cell MIMO trial system operating over bandwidth of 20 MHz...
Multiple-input multiple-output (MIMO) channel sounding measurements were conducted in a typical indoor line-of-sight (LOS) office room environment in Harbin Institute of Technology Shenzhen Graduate School and the results of spatial correlation under different polarization patterns were analyzed. The measurement campaign at a frequency of 2.45G using 4×4 MIMO structure was carried out in order to...
This paper proposes a pilot-assisted sampling frequency offset (SFO) estimation algorithm for MIMO OFDM (multiple-input multiple-output orthogonal frequency division multiplexing) systems. The sampling frequency offset is estimated from phase errors in the received pilot subcarrier symbols between two transmitted OFDM blocks. The optimal weight for each SFO estimate is derived. The proposed weighted...
In this paper, we first derive a lower bound for the capacity of MIMO system employing dual-polarization diversity. An upper bound is also derived in the high SNR regime. In a second part, the tightness and validity of the bounds are analyzed by a definition named pseudo condition number. We conclude that the correlation matrices of antenna array have a great impact on the tightness of bounds. The...
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