uhd

    //variables to be set by po

    std::string args, wave_type;

    size_t total_duration, mspb;

    float ampl, gain;

    //setup the program options

        ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")

        ("duration", po::value<size_t>(&total_duration)->default_value(3), "number of seconds to transmit")

        ("mspb", po::value<size_t>(&mspb)->default_value(10000), "mimimum samples per buffer")

        ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")

        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")

        ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of the waveform")

    while (true){

        double num_samps_per_buff = periods_per_buff*samps_per_period;

        double sample_error = num_samps_per_buff - boost::math::round(num_samps_per_buff);

        periods_per_buff++;

    }