Linearity evaluation method using integrations weighted by probability density function, and circuit simulator, evaluation device, communication circuit, and program using the method

Abstract

An evaluation method for linearity evaluations neither performing calculations of error vectors at multiple sampling points nor using a demodulator corresponding to a desired modulation scheme. Measuring devices (and) measure the input signal and the output signal of an evaluation object (), to which a predetermined evaluation signal has been inputted. An evaluation unit () uses the input signal and the output signal of the evaluation object (), to determine at least one of an amplitude distortion or a phase distortion of the output signal. An integration unit () uses the distortions to perform the integrations weighted by the probability density function of the power-to-average ratio of a predetermined modulated signal. A linearity index calculation unit () calculates a linearity index from the results of processing by the integration unit ().