Method and apparatus for generating noise-added signal

摘要

A signal generator is provided for adding noise to a signal to generate a noise-added signal. The signal generator comprises a PN coder in a noise generator which generates noise that is added to a signal. The noise generator uses a PN code from the PN coder to generate pseudo white noise at least in a predetermined band. A noise adder adds the noise from the noise generator to a signal from a signal source to generate the noise-added signal.