On Carrier QPSK Signal Detector Based on Second Order Cyclic-Moments - Archive ouverte HAL
Communication Dans Un Congrès Année : 2018

On Carrier QPSK Signal Detector Based on Second Order Cyclic-Moments

Résumé

This paper considers the problem of detecting a QPSK communication signal on carrier. We propose a method to perform the detection thanks to second order cyclostationarity theory. It is well known that for such a signal, there is no cyclic frequency multiple of the studied signal carrier frequency. Hence, the basic method of second order cyclic-moments energy measurement is unable to detect any energy directly linked to the signal carrier. In this article, we propose a novel criterion based on second order cyclic-moments that exploits the convergence speed of the cyclic autocorrelation function estimator. We show that for a modulated QPSK signal the cyclic-correlation converges to zero but not in the same way if the cyclic frequency is a multiple of the carrier frequency or not. We develop a statistical test and derive the asymptotic probability density function of the criterion to propose a detection threshold. System performance simulation results are then evaluated by Monte Carlo simulations and compared to the results of fourth order nonlinear transformation method.
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Dates et versions

hal-01813235 , version 1 (12-06-2018)

Identifiants

Citer

Nicolas Grollier, Sébastien Houcke. On Carrier QPSK Signal Detector Based on Second Order Cyclic-Moments. WCNC 2018 : IEEE Wireless Communications and Networking Conference, Apr 2018, Barcelone, Spain. ⟨10.1109/WCNC.2018.8377024⟩. ⟨hal-01813235⟩
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