It is featured with high system capacity, low power spectral densities, exceptional multi-path immunity, simple structure and low probability of detection.

Then the power spectral densities of UWB signals with difference parameters are simulated by the simulation model, and the feasibility of the model is validated.

Compared with the traditional method, it does not need disassembling the power spectral densities of stochastic signal covariance and is not bound to if the power spectral densities are rational.