Enhancing the Power Spectral Density of PPM-IR for Ultra-Wide Band signals by using a convolutional encoder

The suppression of the spectral line is an issue of major interest in the design of compliant Time Hopping Impulse Radio (TH-IR) Ultra-Wide Band (UWB) systems. This issue has been commonly addressed by randomizing the position of each pulse. In practice; it requires the use of very long Pseudo Random (PR) or Pseudo Noise (PN) sequences to approach the spectral line suppression capabilities. This would be achieved by using an ideal random sequence. This paper aims to enhance the Power Spectral Density (PSD) by building the proposed system inside Simulink/Matlab to test some codes for eliminating the spectral lines or make it smoother to reduce the harmful interference problem on other users. This is proposed to be applied without affecting the users of other applications.