Implementation and comparison of a wideband HF noise and interference simulator

Interference Simulator for the Whole HF Band: Application to CW-Morse

“…Thus, the fundamental structure of both models of interference, our model and the narrow band model, is a sum of sinusoids. In the narrow band interference model chosen as a starting point [8] and [9], the narrowband interferers can be written as ( ) ( )…”

“…where l is the number of the interference, C l are the amplitudes of the sine waves, ∆f l are the baseband frequencies of the sine waves (∆f l = f lf 0 ), f l is the carrier frequency of the interference (RF), f 0 is the offset frequency to baseband and φ l are random phases. The narrow band interference model is based on the results from several case studies [8] and [9]. The data consisted of 42 one-second records of the digitized baseband signal [8].…”

“…where C l depends on two free parameters, θ C and γ C [8] and [9]. θ C and γ C are chosen to fit a reference pdf of the amplitudes of the interference measures.…”

“…1) depends on the fit of the parameters θ C and γ C to specific measurements; 2) therefore depends on the completion of measures in the geographical and temporal environment that you want to simulate; 3) the number of interference, l, is fixed to get the best fit to the measurements and also the start times and duration are chosen to get the best fit to the measurements [8], [9]; 4) does not explicitly include any modulation. Our model, which is presented in the following section, is intended to overcome these disadvantages such that:…”

“…As mentioned, the idea of interference as the sum of sinusoids is taken from a narrow band interference model [8] and [9]. In our model, the waveform of the whole HF band (1,606 -30 MHz) interference is represented as a voltage of the form…”