Implementation of High Order QAM Modulation on SDR

Abstract

Abstract Nowadays, SDR (software-defined radio) has increasingly occupied a place in scientific research and teaching with its powerful signal processing capability and custom ability. XSRP is a development platform which uses an SDR architecture. In this paper, we develop a wireless real-time audio transmission system with high order modulation (64QAM) based on XSRP platform. We use LabVIEW and MATLAB to write the program’s overall framework and functions. We also analyse the performance of different modulation modes by comparing the constellations and waveforms of the transmitter and receiver under the real situation. The results show that high order QAM modulation achieves a good balance between efficiency and quality.