Measuring the Peak-to-Average Power of Digitally Modulated Signals

摘要

Digital vector modulation is being utilised in a wide variety of technologies such as digital cellular radio, high definition television (HDTV), satellite and microwave links, military communication, and numerous spread spectrum applications. Digital vector modulation is a complex modulation scheme whereby a signal's phase and/or amplitude are altered to represent digital bit patterns called symbols. Specific phase/amplitude combinations are called symbol states and valid symbol states are defined on a vector map called an I-Q (in-phase-quadrature) diagram (Fig. 1).