Ease of use Optimization of the Acid Catalyst Concentration for Synthesis of Anti‐Cancer Agent Gamavuton‐0 by Using Mathematical and Statistical Software
3. Metodelogy
Characteristic of signal propagation over the sea was different than terrestrial. On the sea area one of the signals reflected on the water, where the water was moving and has a changeable height. t can be affect the rate of propagation. n this research it using several steps in the methodology. First: Analyzed of the propagation area, Second: finding the theorical and special formula of signal propagation on sea surfaces. Where the analysis of the propagation characteristics of the sea has a parameter losses which depend n exponent parameter on each region. By using the formula n exponent factors ocean waves are in the testing area, namely Tanjung Perak arbor at until Karang Jamuang island . So the path loss value is determined based on the region. From the path loss value is then used as one of parameter in determining the coverage area of the transmitter. Where the coverage area of this transmitter is used a reference in designing the maritime mesh network. 3.1. Analysis of characteristics propagation over the sea 1 Determine of Path Loss Exponnet On the path loss of sea waves one input parameter is the height of the wave, where the wave height is entered based on data from BMKG Surabaya on the working area of Tanjung Perak Surabaya into Karang Jamuang sland. n the study [ ] explained that the wave height factor has affected of maritime communication system, from the research are translated into the value of path loss as in figure . Figure 2 Analysis Of Equation From the analysis of the equation in figure the value of path loss exponent n is equal to: 19 . 8 . Based on the data obtained from BMKG then the value of the wave height h averaged per month and put into the general equation of the path loss exponent to get the value of path loss overall in table . Table . n exponent each month Month Averageof h meter , dBm Path loss exponent September .8 . . October . 8 . . November . 88. . December . . 8 .8 January . . . Februari .88 . . 8 8 March . . . 8 April . 8 . . May . . . June . . 8 . July . . . August . . 8 . September .8 . . The value of path loss exponent is . ‐ . monthly basis or on average produces path loss exponent value equal to . 8. The table of results shows that the path loss is the smallest value of . which occurred in November with the average wave height is . meters. and the highest value of path loss is . which occurred in January with a wave height reaches , meters. So it can be analyzed that affect wave height of signal propagation system, where the higher the waves on the maritime environment, the value of the resulting path loss even greater. 2 Determine of coverage area Coverage is the range of transmission system where the determiner of the coverage value based on the meeting point of transmission level and the sensitivity of the device. Calculation of received power level is determined by using the device specifications wifi outdor which has the specs as follows: Table . Specifications od device system parameters Frequency : .8 Gz Trasmitter power : dBm Antenna gain of Tx : dBi Antenna gain of Rx : dBi Sensitifity power of Rx : ‐ dBm The value of path loss and received power level was tested by using a distance function to find the value in the point of intersection between the received power level at a distance function with constant sensitivity value is ‐ dBm. Then these values are used as a benchmark in determining the coverage area of a transmitter. n the study litelature method which uses high parameter wave has produced a value n of . . the value is then incorporated into the general formula path loss exponent so that the function of distance path loss value generated is shown in Figure : a bParts
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