A QPSK Carrier Estimation Method Based on Modified FFT

Han, Lei; Guo, Ying; Shang, Yaobo

doi:10.1109/wicom.2009.5302459

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“…In suppressed-carrier PSK systems, the frequency estimators can be grouped into two classes: the data-aided estimators and non-data-aided estimators. The data-aided estimators remove the data with the training sequence in a trade off with bandwidth efficiency, and then estimate the single-tone frequency [3][4][5]. These estimators are not suitable in some cases, e.g.…”

Section: Introductionmentioning

confidence: 99%

Blind Estimator of Frequency Offset for Coherent M-PSK Systems

Wang

Xiong

2012

2012 8th International Conference on Wireless Communications, Networking and Mobile Computing

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We address the issue of blind estimation of frequency offset for coherent M-ary phase shift keying (M-PSK) systems. An estimator is introduced, which is based on spectrum analysis of the signal's argument and multiple stages of amplifying and wrapping. Different from the previous estimators, it does not require the timing synchronization, data aid, the information of symbol rate and even the modulation type, and has lower implementation complexity. Through numerical simulation, it is found to be applicable in autonomous radio for M-PSK systems.

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Section: Introductionmentioning

confidence: 99%