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We consider the downlink of a multi-cell network where neighboring base stations with large scale antennas share the spectrum and collaborate with each other to improve the overall network performance. This paper utilizes the zero-forcing (ZF) transmit beamformer, which has been proven as the simplest and optimal form for high SNR in large scale antennas system. The objective of the coordination is...
A new transmission strategy that consists of a spatial scheduling algorithm and two precoding algorithms is developed for multicarrier multiuser (MU) multiple-input–multiple-output (MIMO) systems. The scheduling algorithm, which is called efficient multicarrier ProSched (EMC-ProSched), adopts a novel and effective scheduling metric for each user and can efficiently search for a suitable group of users...
Magnetic resonance sounding (MRS) signal is quite weak. Usually it is very susceptible to outside noise interference when measured using MRS groundwater detector, so that the characteristic parameters extracted from the returned signal data are inaccurate; eventually leading to an inaccurate location of groundwater through inversion explanation. And because of the high sampling frequency and large...
In this work, a novel linear precoding algorithm, called linear precoding-based geometric mean decomposition (LP-GMD), is proposed for the downlink of multi-user (MU) multiple-input multiple-output (MIMO) systems. The proposed scheme suppresses the multi-user interference (MUI) at the BS. Then it uses the GMD to decompose the equivalent single-user MIMO channel into multiple parallel sub-channels...
Local area wireless networks based on IEEE 802.11 have a cellular topology: Stations associate to one of several access points, which are connected using a wired backbone. As connectivity is only possible close to the access points, a dense infrastructure is needed, resulting in high costs. A Wireless Mesh Network (WMN) replaces the wired backbone by radio: Only few access points are installed; mesh...
Service-area specific optimization is a necessity for large-scale wireless networks. For this task, a model to estimate the quality of a radio network configuration is required. In the case of cellular radio networks, much work exists on models for Radio Network Planning (RNP). This work cannot be applied to optimize IEEE 802.11-based Wireless Mesh Networks (WMNs), as their multi-hop structure and...
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