ns3 wifi channel

ns3

    /*
    YansWifiChannelHelper wifiChannel;
    wifiChannel.SetPropagationDelay("ns3::ConstantSpeedPropagationDelayModel");
    if (frequency == 6){
        // Reference Loss for Friss at 1 m with 6.0 GHz
        wifiChannel.AddPropagationLoss("ns3::LogDistancePropagationLossModel",
                                       "Exponent",
                                       DoubleValue(2.0),
                                       "ReferenceDistance",
                                       DoubleValue(1.0),
                                       "ReferenceLoss",
                                       DoubleValue(49.013));
    } else if (frequency == 5){
        // Reference Loss for Friss at 1 m with 5.15 GHz
        wifiChannel.AddPropagationLoss("ns3::LogDistancePropagationLossModel",
                                       "Exponent",
                                       DoubleValue(2.0),
                                       "ReferenceDistance",
                                       DoubleValue(1.0),
                                       "ReferenceLoss",
                                       DoubleValue(46.6777)
);
 
    } else {
        // Reference Loss for Friss at 1 m with 2.4 GHz
        wifiChannel.AddPropagationLoss("ns3::LogDistancePropagationLossModel",
                                       "Exponent",
                                       DoubleValue(2.0),
                                       "ReferenceDistance",
                                       DoubleValue(1.0),
                                       "ReferenceLoss",
                                       DoubleValue(40.046));
    }
     */
 
    //wifiPhy.SetChannel (wifiChannel.Create ());