APSK Modulation Recognition for DVB-S2 Using GLRT and Radius-Constellation Under Frequency Offset
In this paper, the problem of recognizing APSK modulation for DVB-S2 is studied. We propose a novel recognition method, which is robust to carrier frequency offset and phase error. Firstly, the radius-constellation is defined and the algorithm to transform the traditional constellation to radius-constellation is proposed. And then, we propose a first-ever radius-constellation based method to recognize the APSK modulation, using Generalized Likelihood Ratio Test. Simulation results show that the proposed method is effective for APSK modulation recognition under frequency offset.
apsk modulation recognition glrt radius-constellation