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In this paper, we propose a positioning system using a time-synchronized wireless network that can achieve high positioning accuracy without being dependent on any global positioning system (GPS) devices with cm-level accuracy as the main goal and objective. The proposed system utilizes time of arrival (ToA) method to estimate the target's position. Based on the results, we can achieve time synchronization...
For the last decades, the advancement of system on chips complexity and size are driving the verification process of the digital designs to be much more complicated and time consuming. Moreover, nowadays, the verification process takes up to 80% of overall design development time. This paper emphasizes the importance of automatic testbench generator for industrial wireless local area network (iWLAN)...
In this work, an improved Precision Time Protocol (PTP) used to synchronize clocks in industrial Wireless Local Area Network (WLAN) communication systems is addressed. In order to enhance the accuracy of the PTP synchronization, we first provide an approach to remove the drift factor of frequency of crystal oscillators on the master and slave clocks without any additional message exchanges added to...
In this paper, an industrial Wireless Local Area Network (iWLAN) solution to control industrial robots (iRBs) in large-scale factory automation (FA) environment is addressed. In the large-scale industrial network composed of multiple access points (APs), a delay time during roaming from one AP to another AP causes a discontinuation of the control of the iRBs. This roaming delay is usually induced...
In this work, an industrial Wireless Local Area Network (iWLAN) system used to control industrial robots (iRBs) in factory automation (FA) environments is addressed. For fast and deterministic communication, we propose a synchronous multi-user round-robin transmission protocol. To reduce the overhead caused by the conventional multiple downlink access, we also propose a low overhead Packet Division...
Optical wireless systems have attracted much attention, because they allow high speed transmission without electromagnetic interference. Orthogonal frequency division multiplexing (OFDM) can send multiple high speed signals by using orthogonal carrier frequencies. Recently, studies have focused on the optimal OFDM technique for optical wireless systems. When using OFDM, one important issue is the...
In this paper, an industrial Wireless Local Area Network (iWLAN) solution applied to control industrial robots (iRBs) in the factory automation (FA) environment is addressed. The fast and safety are the goals of our proposed system. The first proposal is an advanced round-robin iWLAN transmission protocol whose operation is strictly controlled by a precise synchronous scheduling mechanism. The second...
Long Term Evolution (LTE) physical layer identity can be recognized either in frequency domain or time domain. In this paper we serve some comparisons in term of complexity, latency, and recognition probability. As a result, frequency domain detection has superiority on performance for SNR higher than 3dB on all channel models, as well as lower latency than time domain scheme one. However, it requires...
Long Term Evolution (LTE) is one of radio access technology that has been intensively studied in 3GPP standard group to support instantaneous downlink and uplink peak data rates of 100 Mb/s and 50 Mb/s within 20 MHz downlink and uplink spectrum allocations, respectively. Employing OFDMA and scalable bandwidth scheme in downlink access impact on increasing cell search complexity. In this paper we propose...
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