With the real restriction of packet size and transmission power, a joint UL-AoA (Uplink Angle of Arrival) and UL-TDOA (Uplink Time Difference of Arrival) positioning method is discussed for the Industrial Internet of Things (IIoT), which demands high accuracy of position information. One motivation of the UL positioning method of IIoT is an asymmetric network and uplink traffic is dominant in most identified scenarios. Further, IIoT sensors are power limited for low cost, compared to the transmission power of base stations and other normal user equipment. This paper considers an environment of a 5G-enabled IIoT network with massive Multiple input multiple output (MIMO) antennas, beamforming and millimeter operating bands. After reviewing downlink positioning reference signal (PRS) and uplink sounding reference signal for positioning (SRS-Pos), a general system model and a theoretical localization problem is derived under the joint positioning method. The provided simulation results help to investigate the impact of system configurations on positioning measurements. Further, through the test in this paper, it is proved that joint positioning outperforms that of the time only or angle only method.

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A miniature condenser microphone array that combines array signal processing and MicroElectro-Mechanical Systems technologies is developed for bionic ears. Electroacoustical analogy is employed to establish a linear dynamic model of the silicon microphone, while a quasi-static analysis based on the $,ire difference method is conducted to$nd the collapse condition. The array configuration seryes two purposes: enhancement of the sensitivify and directivify of the transducer. A least square beamfonning design based on the template resulting from the Multiple Signals Classification algorithm is proposed to achieve a highly directive beam pattern. To minimize the parasitic effects on the MEMS device, a System-on-Chip design is proposed in the paper. The design is composed of a microphone module, a bias circuit, an impedance matching circuit, an on-chip amplifier and array beamfonning filter. The perjormance of the proposed design is evaluated in the frequency response through numerical simulations and the results are discussed