Weiqiang Tan

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In this paper, we investigate the achievable ergodic sum-rate for multiuser massive multiple-input multiple-output systems, where different array configurations such as uniform linear arrays (ULAs), uniform planar arrays (UPAs) and uniform circular arrays (UCAs), are deployed at the base station (BS). The investigation is carried out based on a three(More)
This paper investigated the uplink of multiuser massive multi-input multi-output (MIMO) systems with a mixed analog-to-digital converter (ADC) receiver architecture, in which some antennas are equipped with costly full-resolution ADCs and others with less expensive low-resolution ADCs. A closed-form approximation of the achievable spectral efficiency (SE)(More)
A voluminous literature suggests that host country institutions affect the inward internationalization of foreign entrants To the extent that any internationalization move involves at least two countries (host and home), then, what about the impact of home country institutions on firms that internationalize? Until recently, the literature had largely(More)
In this paper, we investigate the achievable downlink rate of line-of-sight (LOS) multiple-input multiple-output (MIMO) systems, where uniform circular arrays (UCAs) is deployed at Base station (BS). Based on an existing three-dimensional channel model developed by considering both the azimuth and elevation dimensions. We first analyze channel vectors by(More)
In this paper, we investigate the achievable uplink spectral efficiency (SE) and its approximate analytical expression in massive multi-input multi-output (MIMO) systems, using finite precision analog-digital converters (ADCs) and zeroforcing (ZF) technique at the receivers. To analyze the system performance, we adopt the additive quantization noise model,(More)
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