Blind identification of binary LDPC codes for M-QAM signals
Document Type
Conference Proceeding
Publication Date
1-1-2014
Abstract
In this paper, we propose a blind binary low-density parity-check (LDPC) encoder identification scheme for M-quadrature amplitude modulation (M-QAM) signals. The expectation-maximization (EM) algorithm is developed to estimate the unknown signal amplitude, noise variance, and phase offset for M-QAM signals. The a posteriori probabilities (APPs) of the coded bits are obtained from the APPs of the transmitted symbols according to the M-QAM mapper. Monte Carlo simulation results demonstrate the effectiveness of our proposed new blind binary LDPC encoder identification scheme for different modulation orders. The average iteration number needed for the EM algorithm to converge is also investigated for different modulation orders.
Publication Source (Journal or Book title)
Proceedings - IEEE Global Communications Conference, GLOBECOM
First Page
3532
Last Page
3536
Recommended Citation
Xia, T., Wu, H., Chang, S., Liu, X., & Huang, S. (2014). Blind identification of binary LDPC codes for M-QAM signals. Proceedings - IEEE Global Communications Conference, GLOBECOM, 3532-3536. https://doi.org/10.1109/GLOCOM.2014.7037355