New Digital Signal-Processing Approaches for Measuring Power CCDF Curves

摘要

Signals peculiar to modern telecommunication systems are characterized by higher peak-to-average power ratios than in the past and can potentially lead to higher distortion in amplification stages if signal power statistics are not accounted for properly. CCDF (Complementary Cumulative Distribution Function) curves are an effective way of fully specifying signal power characteristics. Some high performance analysers, currently available on the market, carry out CCDF measurements through a demodulation of the radiofrequency signal and the application of custom digital signal-processing algorithms to the samples of the baseband components thus retrieved. Two alternative digital signal-processing approaches for measuring CCDF curves are presented in the paper. The major advantage they offer consists in the absence of demodulation; they are, in fact, based on original algorithms that are directly applied to the samples of the radiofrequency signal.