Extension to Gardner Timing Error Detector for QPSK Signals
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.
Dewei Yang Chaoxing Yan Hua Wang Jingming Kuang Nan Wu
Department of Electronics Engineering Beijing Institute of Technology, 100081 Beijing, P.R.China
国际会议
上海
英文
1-5
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）