Abstract—The method of block orthogonal amplitude modulation (QAM) is presented and the demodulation recognition method is studied in this paper. Based on ordinary orthogonal modulation, the basic feature vector is extracted from the received signal cluster sample to estimate the signal parameters of data block for achievement of data block demodulation by using matrix transformation which can reach the recognition of signal modulation. The simulations results show that recognition rate can achieve 90% above under the condition of SNR which is 4 dB and the system is easy to realize, it has wide application prospect in signal recognition.

Index Terms—Block orthogonal amplitude modulation, clustering example, clustering iterative algorithm, basic vector, demodulation recognition

Cite: Faquan Yang, Zan Li, and Jie Zheng, "A New Method of Modulation Recognition of Block Orthogonal Amplitude Modulation," Journal of Communications, vol. 9, no. 9, pp. 693-698, 2014. Doi: 10.12720/jcm.9.9.693-698