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Link Efficiency-Based Topology Control Algorithm for IoT Domain Application
Published in Sanjeev J. Wagh, Manisha Sunil Bhende, Anuradha D. Thakare, Energy Optimization Protocol Design for Sensor Networks in IoT Domains, 2023
Sanjeev J. Wagh, Manisha Sunil Bhende, Anuradha D. Thakare
The energy of receiving signal is measured by RSSI. In the case of radio frequency waves, power is inversely proportional to distance. The energy of transmitting a signal can be measured and distances d calculated. The power of receiving signal is calculated by subtracting path loss of transmitted power. RSSI stands for received signal strength indication, which indicates the power of a signal on any wireless or radio link. Its unit is dB. RSSI is used for receiving the end of the channel. RSSI is used for the estimation of node connectivity and node distance. RSSI is used for sampling the channel power. The relationship between distance and RSSI values is the foundation for wireless sensor networks represented in Equation (4.1) [1]. Pr=Pt⋅(1/d)n
Calibration Method of Tool Center Frame on Manipulator
Published in Chunguang Xu, Robotic Nondestructive Testing Technology, 2022
In the field of signal analysis, the received signal strength indicator (RSSI) is an indicator of received signal strength. It is a localization technique that determines the distance between the transmitting point and the receiving point according to the strength of the received signal, and then performs the location calculation based on the corresponding data. According to the RSSI principle, a four-attitude calibration method for calibrating the TCF of the special-shaped extension arm is proposed. This method does not need any external measuring device. In four different attitudes, the center point of the end of the special-shaped tool held by the manipulator was moved to the auxiliary tool center point BPATCP (ATCP), as shown in Figure 10.1.
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Published in Philip A. Laplante, Comprehensive Dictionary of Electrical Engineering, 2018
are called a realization of a given transfer matrix T (z 1 , z 2 ) if they satisfy (2). A realization (3) is called minimal if the matrix A has minimal dimension amongst all realizations of T (z 1 , z 2 ). The (minimal) realization problem can be stated as follows. Given a proper transfer matrix T (z 1 , z 2 ) R p×m (z 1 , z 2 ), find matrices (3) (with minimal dimension of A) that satisfy (2). received signal strength indicator (RSSI) ratio of signal power level for a single frequency or a band of frequencies to an established reference; the reference is typically 1 mW, and the resultant value is expressed in decibels. RSSI is often used in mobile communications to make assessments such as to which base station a call should be connected or which radio channel should be used for communication. receiver noise thermal (Boltzmann-type) noise in a receiver, a function of its physical temperature above absolute zero and the noise bandwidth of the receiver's electronic devices. Receiver noise causes finite receiver sensitivity. See also thermal noise. receiver operating characteristics curve plot of the probability of detection (likelihood of detecting the object when the object is present) versus the probability of false alarm (likelihood of
Monitoring profile based on a linear regression model with correlated errors
Published in Quality Technology & Quantitative Management, 2018
‘Babyfinder’ presents a device designed to detect if an event of certain concern occurs. For example, it can be used in health care, warehousing, for tracking babysisters, heart trouble patients, stolen bicycles, etc. It includes a transceiver and a receiver. Once a set distance occurs between the transceiver and the receiver, a signal strength is generated. The signal strength is called Received Signal Strength Indicator (RSSI), which is a measurement of the power present in a received radio signal (measured in decibels, dBs), in wireless communication technology. In wireless communication theory, the functional relationship between RSSI and distance is expressed by the model:
Wireless sensing modules for rural monitoring and precision agriculture applications
Published in Journal of Information and Telecommunication, 2018
Phat Tan Lam, Tan Quang Le, Ngan Nguyen Le, Son Dat Nguyen
Received Signal Strength Indicator (RSSI) is the total received signal power at the receiver (in this case it is the sensing module), calculated in mW or in dBm. Typically, RSSI of available wireless sensing modules is in the range from −20 to −110 dBm. From theory, the average value of RSSI could be calculated as follows (Rajan & Soman, 2015):where RSSI_val is an average value of RSSI at a measured point, m is the number of samples, and RSSIi is the measured value of each sample.
Smart networks of autonomous in-situ soil sensors
Published in European Journal of Environmental and Civil Engineering, 2023
Xavier Chavanne, Jean-Pierre Frangi
Signal strength is assessed at the gateway for each received point owing to two indicators. The Received Signal Strength Indication (RSSI) is the absolute signal power measured in dBm. It is a negative value with a minimum of −120 dBm. Signal-to-Noise Ratio (SNR) is the ratio in dB between the signal power and the noise floor power level, which represents all unwanted interfering signal sources. LoRa can work below the noise floor, with SNR values as low as −24 dB. SNR is compared to the rate of losses we determine over time i the following section.