Method of generating an RF signal modulated by a message signal and distorted by a predetermined fading profile for testing RF receivers, and apparatus for carrying out the method including a fading simulator

摘要

For generating an RF signal modulated by a message and distorted by a predetermined fading profile for testing RF receivers, a sequence of digital phase and amplitude values which corresponds to the message modulation is arithmetically processed by a predetermined fading profile and stored in memory, and an RF carrier is amplitude and phase modulated by the stored values to produce a testing signal for the RF receivers.