Stabilizing Transmission Capacity in Millimeter Wave Links by Q-Learning-Based Scheme

Due to uncontrollable factors (e.g., radio channel quality, wireless terminal mobility, and unpredictable obstacle emergence), a millimeter wave (mmWave) link may encounter some problems like unstable transmission capacity and low energy efficiency. In this paper, we propose a new transmission capacity stabilization scheme based on the Q-learning mechanism with the aid of edge computing facilities in an integrated mmWave/sub-6 GHz system. With aid of the proposed scheme, an integrated mmWave/sub-6 GHz user equipment (UE) can adjust its transmission power and angle, even choose a relaying UE to stabilize its transmission capacity. Differing from traditional schemes, the proposed scheme is run in edge computing facilities, where any UE only needs to provide its personalized information (e.g., base station discovery, neighboring UEs, working status (i.e., busy and idle), position coordinates, and residual energy level), and then it will receive intelligent and adaptive guidance from edge computing facilities. This facilitates each UE to maintain its transmission capacity stability by adjusting its radio parameters. The simulation results show that any UE with aid of the proposed scheme can achieve more stable transmission capacity and higher energy efficiency.

Design of Motor Control System Based on Wireless Sensor Network

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: DE; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">More and more modern devices are controlled by miniature special motors. But many existing miniature special motors are using mostly independent test methods through wire communication. In this paper, starting from the requirements of motor testing and the situation of workshop environment, a motor measurement and control system based on wireless sensor network is proposed and designed. This paper elaborates the relevant technical analysis and specific implementation of TT &amp; C module, wireless terminal, wireless router, wireless gateway and host computer measurement and control module. At last, the test function and effect of the system are explained according to the test samples. The reliability and stability of the system are verified through reliability analysis.</span>

Decoupling of Dual-band Closely Spaced MIMO Antennas Based on Novel Coupled Resonator Structure

A pair of dual-band closely spaced MIMO monopole antenna array working at WLAN 2.45/5.25GHz with a dual-band coupled resonator structure for decoupling is proposed, the edge-to-edge distance of which is 0.0735 ${^{\lambda _0}}$ at 2.45GHz and 0.1575 ${^{\lambda _0}}$ at 5.25GHz. Simulation and measurement on coupled antennas and decoupled antennas indicate that mutual coupling reductions of 24.52dB and 26.57dB at two frequencies are achieved. With good impedance matching, improved total efficiency and increased channel capacity, the proposed structure owns good applicability, compact size and effective decoupling capability, and is promising in the application of wireless terminal MIMO system.

Development and Validation of New Reverberation Chamber for Wireless Devices

This paper proposes a reverberation chamber structure consisting of new reflectors and mode stirrers for electromagnetic compatibility and wireless terminal measurements. The key design considerations for them are determined through a reasonable approach to analyze the eigenmode for a reverberation chamber and the standard deviation of its working volume based on 3D simulation. The final designs are expected to improve the standard deviation performance of the initial structure of the reverberation chamber and provide a better mode stirring environment. The results measured in the fabricated chamber demonstrate that these predictions are clearly realized. The results satisfy the main requirements of this paper, which are defined in consideration of the specifications of commercial reverberation chamber products. Therefore, the reverberation chamber of this paper is expected to be useful for performance measurement and evaluation of commercial wireless terminals. To verify this logical approach to obtain a good design and its results, the results measured in the actual fabricated reverberation chamber are described along with analytical and computational results.

Design of Wireless Sensing Virtual Cloud Desktop System Based on ARM-Linux

Aiming at exploring the wireless sensing network with mass processing in data collection, an embedded wireless sensor system based on ARM-Linux is put forward and designed. The whole system is mainly divided into wireless ZigBee sensing node group part, ARM data processing part, and virtual cloud desktop terminal part. Users’ terminal can be connected to the cloud system server through wired or wireless ways. And it is possible to view user system data and wireless terminal data by logging in to an individual account. The results showed that the system can be applied in a lot of fields, such as intelligent transportation, health care, smart home and so on. Based on the above findings, it is concluded that it is important for information aggregation and remote fast monitoring.