dqpsk的调制解调建模与仿真研究，研究生论文，华中科技大学-dqpsk modem modeling and simulation studies, graduate thesis, Huazhong University of Science

This paper presents the simulation performance of the all-digital symbol timing recovery using the Gardner Timing Error Detector over π/4-DQPSK modulation. The open loop statistics, the S-curve and the normalized timing error variance, were investiga