A new SNR's estimator for QPSK Modulations in an AWGN channel

Signal-to-noise ratio (SNR) measurement is required in many receivers and systems of communications. In this brief, we derive a new SNR's estimator based on the second and fourth-order moments of the complex signals of quadrature phase-shift keying modulations. The mean square error of the esti...

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Veröffentlicht in:	IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2005-06, Vol.52 (6), p.336-338
Hauptverfasser:	Ren, Guangliang, Chang, Yilin, Zhang, Hui
Format:	Artikel
Sprache:	eng
Schlagworte:	Additive white noise Algorithms AWGN channels Channels Circuits Estimators Gaussian noise Mean square values Mobile communication Modulation Phase estimation Phase modulation Phase shift keying Quadrature phase shift keying Quadrature phase-shift keying (QPSK) Receivers Satellite communication second- and fourth-order moment Signal to noise ratio signal-to-noise ratio (SNR) estimation
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Beschreibung
Zusammenfassung:	Signal-to-noise ratio (SNR) measurement is required in many receivers and systems of communications. In this brief, we derive a new SNR's estimator based on the second and fourth-order moments of the complex signals of quadrature phase-shift keying modulations. The mean square error of the estimated SNR by the proposed algorithm is smaller than that by other methods for a low SNR with limited samples.
ISSN:	1549-7747 1057-7130 1558-3791
DOI:	10.1109/TCSII.2005.849008