Title :
Extension to Gardner timing error detector for QPSK signals
Author :
Yang, Dewei ; Yan, Chaoxing ; Wang, Hua ; Kuang, Jingming ; Wu, Nan
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
In this paper, based on analyzing the detector characteristics of modified Gardner (mGA) timing error detector examined before, an extended non-carrier-blind detector is proposed for quadratic phase shift keying (QPSK) signals. The timing jitter performance of new detector is about 2dB-10dB better than that of mGA at low and high signal-to-noise ratio (SNR) respectively. However, this advantage is achieved under perfect phase recovery, which can be achieved by non-timing-aided M-th power phase recovery loop in front of the timing loop with an acceptable phase deviation of 5 degree. Moreover, the computational complexity of new detector is lower than that of mGA. This extension method can also be applied to higher order modulation.
Keywords :
blind source separation; error detection codes; quadrature phase shift keying; signal detection; timing jitter; QPSK signal; computational complexity; modified Gardner timing error detector; noncarrier-blind detector; phase deviation; power phase recovery loop; quadratic phase shift keying; signal-to-noise ratio; timing jitter performance; timing loop; Detectors; Gallium; Jitter; Matched filters; Phase shift keying; Signal to noise ratio; Timing; feedback; timing error detector; timing jitter;
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2010 International Conference on
Conference_Location :
Suzhou
Print_ISBN :
978-1-4244-7556-8
Electronic_ISBN :
978-1-4244-7554-4
DOI :
10.1109/WCSP.2010.5633556
