/// @brief Create a Rice fading model implementation.
/// @param K The Rice fading parameter in dB.
/// @param A Return the mean total power in dBp where 'p' is some power unit.
Impl(double K, double A)
: _M_K{std::pow(10.0, K / 10.0)},
_M_A{std::pow(10.0, A / 10.0)},
_M_nu{std::sqrt(_M_K * _M_A / (_M_K + 1.0))},
_M_sigma{std::sqrt(_M_A / (2.0 * (_M_K + 1.0)))},
_M_re{system_now()},
_M_rd{_M_nu, _M_sigma},
_M_gen{std::bind(_M_rd, _M_re)}
{ }
explicit LogEntry(LogLevel level) : level(level) { time = system_now(); }
