Modulation Identification of Digital M-ary QAM Signals by Hilbert-Huang Transform


Tanc Y. H. , Akan A.

2013 IEEE International Conference on Electronics, Circuits, and Systems, Abu Dhabi, Birleşik Arap Emirlikleri, 8 - 11 Aralık 2013, ss.678-681 identifier identifier

  • Cilt numarası:
  • Doi Numarası: 10.1109/icecs.2013.6815505
  • Basıldığı Şehir: Abu Dhabi
  • Basıldığı Ülke: Birleşik Arap Emirlikleri
  • Sayfa Sayıları: ss.678-681

Özet

The problem of identifying the modulation types of the signals at the receiver is an intermediate step between signal detection and demodulation. In this paper, Hilbert-Huang Transform is proposed for identifying the modulation level of M-ary Quadrature Amplitude Modulation (QAM) signals in the presence of the Additive White Gaussian Noise. Hilbert-Huang Transform decomposes the non-stationary signal into sum of oscillatory signals with different frequency and obtains the instantaneous features of the signals, like time-frequency and time-amplitude information. The statistical properties of instantaneous data sets are used to determine the modulation levels of M-ary QAM signals. The most important feature of the proposed method is that, the algorithm does not utilize any a priori knowledge about the signal. Computer simulations demonstrate the accuracy of the proposed algorithm.