Qiang Li

TL;DR: In this article, the issues involved in the design of antenna array architecture for future 5G mmw systems, in which the antenna elements can be deployed in the shapes of a cross, circle, or hexagon, are discussed, in addition to the conventional rectangle.

TL;DR: In this paper, human tendency and clustering behaviors are first considered to evaluate the user mobility performance for 5G small cell networks based on individual mobility model (IMM), and key contributions, user pause probability, user arrival, and departure probabilities are derived in a hotspot-type 5G Small Cell network.

TL;DR: As key contributions, user pause probability, user arrival, and departure probabilities are derived in this paper for evaluating the user mobility performance in a hotspot-type 5G small cell network.

TL;DR: A simple adaptive protocol is considered in the two-way relaying scenario, which switches between AF and DF depending on the decodability of the two bi-directional data streams at the relay, and it always outperforms the non-adaptive schemes.

TL;DR: This work analytically derive the outage probabilities for both the primary and secondary systems under the proposed cognitive two-way relaying (CTR) protocol and shows that a spectrum-sharing region exists such that there will be a power-allocation threshold above which the proposed CTR protocol is able to provide a better outage performance for the primary system and, at the same time, achieve secondary spectrum sharing.