/* * * Copyright (c) 2003 Tienshiao Ma * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package SOMCalc; import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import net.jscience.util.MathFP; /** * * @author Tienshiao Ma * @version */ public class SOMCalc extends MIDlet implements CommandListener { private String Radios[] = { "Generic", "Senao 2511", "Orinoco", "Cisco" }; private int RadioSpecs[][] = { { 0, 0, 0, 0 }, // Generic { -89, -91, -93, -95 }, // Senao { -82, -87, -91, -94 }, // Orinoco { -85, -89, -91, -94 } }; // Cisco private String Speeds[] = { "11", "5.5", "2", "1" }; private Command exitCommand; // The exit command private Command backCommand; private Command calcCommand; private Display display; // The display for this MIDlet private Form main; private TextField tfMHz; private TextField tfMiles; private TextField tfTxPower; private TextField tfTxGain; private TextField tfRxGain; private ChoiceGroup cgAgency; private ChoiceGroup cgAnalysis; private ChoiceGroup cgLinkType; private ChoiceGroup cgRadio; private Form results; public SOMCalc() { display = Display.getDisplay(this); exitCommand = new Command("Exit", Command.EXIT, 2); main = new Form("SOM Calculator"); tfMHz = new TextField("MHz:", "2400", 10, TextField.NUMERIC); tfMiles = new TextField("Miles:", "", 10, TextField.NUMERIC); tfTxPower = new TextField("Tx Power:", "", 10, TextField.NUMERIC); tfTxGain = new TextField("Tx Gain:", "", 10, TextField.NUMERIC); tfRxGain = new TextField("Rx Gain:", "", 10, TextField.NUMERIC); main.append(tfMHz); main.append(tfMiles); main.append(tfTxPower); main.append(tfTxGain); main.append(tfRxGain); cgAgency = new ChoiceGroup("Regulatory Agency:", Choice.EXCLUSIVE); cgAgency.append("FCC", null); cgAgency.append("none", null); main.append(cgAgency); cgLinkType = new ChoiceGroup("Link Type:", Choice.EXCLUSIVE); cgLinkType.append("P2P", null); cgLinkType.append("P2MP", null); main.append(cgLinkType); cgAnalysis = new ChoiceGroup("Expert Analysis?", Choice.EXCLUSIVE); cgAnalysis.append("Yes", null); cgAnalysis.append("No", null); main.append(cgAnalysis); cgRadio = new ChoiceGroup("Radio:", Choice.EXCLUSIVE); for (int i = 0; i < Radios.length; i++) { cgRadio.append(Radios[i], null); } main.append(cgRadio); calcCommand = new Command("Calc", Command.SCREEN, 2); main.addCommand(exitCommand); main.addCommand(calcCommand); main.setCommandListener(this); } public void startApp() { display.setCurrent(main); } public void pauseApp() { } /** * Destroy must cleanup everything not handled by the garbage collector. * In this case there is nothing to cleanup. */ public void destroyApp(boolean unconditional) { } /* * Respond to commands, including exit * On the exit command, cleanup and notify that the MIDlet has been destroyed. */ public void commandAction(Command c, Displayable s) { if (c == exitCommand) { destroyApp(false); notifyDestroyed(); } else if (c == calcCommand) { int fixedPathLoss; int fixedSignal; int EIRP; int txGain; try { int fixedFreq = MathFP.toFP(tfMHz.getString()); int fixedMiles = MathFP.toFP(tfMiles.getString()); // $pathloss = 20 * log10($freq) + 20 * log10($miles) + 36.6; // = 20 * (log10($freq) + log10($miles)) + 36.6; // = 20 * (ln($freq)/ln(10) + ln($miles)/ln(10)) + 36.6; fixedPathLoss = 20 * (MathFP.div(MathFP.log(fixedFreq), MathFP.log(MathFP.toFP(10))) + MathFP.div(MathFP.log(fixedMiles), MathFP.log(MathFP.toFP(10)))) + MathFP.toFP("36.6"); // $signal = $txpower + $txgain - $pathloss + $rxgain; fixedSignal = MathFP.toFP(tfTxPower.getString()) + MathFP.toFP(tfTxGain.getString()) - fixedPathLoss + MathFP.toFP(tfRxGain.getString()); txGain = Integer.parseInt(tfTxPower.getString()); EIRP = txGain + Integer.parseInt(tfTxGain.getString()); } catch (NumberFormatException nfe) { return; } results = new Form("SOM Results"); results.append(new StringItem("Rcv Signal:", MathFP.toString(fixedSignal, 1) + "dBm")); results.append(new StringItem("Path Loss:", MathFP.toString(fixedPathLoss, 1) + "dB")); results.append(new StringItem("Miles:", tfMiles.getString())); results.append(new StringItem("EIRP:", Integer.toString(EIRP) + "dBm")); if (cgAgency.getSelectedIndex() == 0) { // FCC results.append("\n"); if (cgLinkType.getSelectedIndex() == 0) { // Point to Point int maxEIRP = ((txGain - 6) / 3) * 2 + 36; if (EIRP > maxEIRP) { results.append("Exceeds FCC Regulations\n"); } else { results.append("Meets FCC Regulations\n"); } } else { // Point to Multi-Point if (EIRP > 36) { results.append("Exceeds FCC Regulations\n"); } else { results.append("Meets FCC Regulations\n"); } } } if (cgAnalysis.getSelectedIndex() == 0) { // Yes to Expert Analysis results.append("--\n"); int radio = cgRadio.getSelectedIndex(); if (radio > 0) { results.append("Expert Analysis\n"); results.append(new StringItem("Radio Type:", Radios[radio])); results.append("\n"); for (int i = 0; i < 4; i++) { results.append(Speeds[i] + "mbps (" + RadioSpecs[radio][i] + ")\n"); int fixedMargin = fixedSignal - MathFP.toFP(RadioSpecs[radio][i]); if (MathFP.max(fixedMargin, 0) == fixedMargin) { results.append(new StringItem("Link:", "Yes")); } else { results.append(new StringItem("Link:", "No")); } results.append(new StringItem("Margin:", MathFP.toString(fixedMargin, 1) + " dB")); int intMargin = MathFP.toInt(fixedMargin); if (intMargin < 8) { results.append(new StringItem("Reliability:", "Unreliable")); results.append(new StringItem("Uptime:", "(<90%)")); } else if (intMargin < 18) { results.append(new StringItem("Reliability:", "Poor")); results.append(new StringItem("Uptime:", "(90%-99%)")); } else if (intMargin < 28) { results.append(new StringItem("Reliability:", "Fair")); results.append(new StringItem("Uptime:", "(99%-99.9%)")); } else if (intMargin < 38) { results.append(new StringItem("Reliability:", "Good")); results.append(new StringItem("Uptime:", "(99.9%-99.99%)")); } else if (intMargin < 48) { results.append(new StringItem("Reliability:", "Excellent")); results.append(new StringItem("Uptime:", "(99.99%-99.999%)")); } else if (intMargin >= 48) { results.append(new StringItem("Reliability:", "Solid")); results.append(new StringItem("Uptime:" ,"(>99.999%)")); } } } else { results.append("Expert Analysis requires a radio selection\n"); } } backCommand = new Command("Back", Command.SCREEN, 2); results.addCommand(exitCommand); results.addCommand(backCommand); results.setCommandListener(this); display.setCurrent(results); } else if (c == backCommand) { display.setCurrent(main); } } }