[31] | 1 | /************************************************************************************ |
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| 2 | * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University |
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| 3 | * All rights reserved. |
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| 4 | * Refer to LICENSE for terms and conditions of use. |
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| 5 | ***********************************************************************************/ |
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| 6 | //Petroaca - object which measures the interference and noise on the station for the duration of a frame |
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| 7 | package vnsim.network.dsrc; |
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| 8 | |
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| 9 | import vnsim.map.object.Globals; |
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| 10 | |
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| 11 | public class NoiseMonitor |
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| 12 | { |
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| 13 | private double InterferenceAndNoiseLevel; |
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| 14 | // the Signal to Interference/Noise Ratio threshold |
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| 15 | |
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| 16 | //the natural noise an antenna experiences |
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| 17 | private double thermalNoise; |
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| 18 | |
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| 19 | //constructor - initialising the IAndN with the value of the thermalNoise and the SINRThreshold with the value best suited for the type of modulation |
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| 20 | public NoiseMonitor(double thermalNoise) |
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| 21 | { |
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| 22 | this.thermalNoise=thermalNoise; |
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| 23 | this.InterferenceAndNoiseLevel=this.thermalNoise; |
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| 24 | } |
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| 25 | |
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| 26 | //when the frame time changes the interference returns to its initial value |
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| 27 | public void refreshInterference() |
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| 28 | { |
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| 29 | this.InterferenceAndNoiseLevel=this.thermalNoise; |
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| 30 | } |
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| 31 | |
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| 32 | |
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| 33 | public void addInterference(double receivedPower) |
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| 34 | { |
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| 35 | this.InterferenceAndNoiseLevel+=receivedPower; |
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| 36 | } |
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| 37 | |
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| 38 | public double getInterference() |
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| 39 | { |
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| 40 | return this.InterferenceAndNoiseLevel; |
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| 41 | } |
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| 42 | |
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| 43 | public double getThermalNoise() |
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| 44 | { |
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| 45 | return this.thermalNoise; |
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| 46 | } |
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| 47 | } |
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