Title :
Simple approach for joint blind equalization and order detection suitable for QAM signal
Author :
Rao, Wei ; Lian, Jing-jing ; Xia, Fei ; Fan, Li ; Xu, Hui-jun ; Tan, Wen-qun ; Dai, Guo-xing
Author_Institution :
Dept. of Electr. & Electron. Eng., Nanchang Inst. of Technol., Nanchang
Abstract :
A blind equalization and order detection algorithm suitable for QAM signal is proposed. By exploiting the inherent structural relationship between the 4-QAM signal´s coordinates and other higher-order QAM signals´ coordinates, a novel cost function including channel blind equalization and signal order detection is defined. In such method, by changing the coordinates of input signals, higher-order QAM signal can be equalized by the statistics of 4-QAM and its order can be detected accurately. Examples of five modulation types - 4-QAM, 8-QAM, 16-QAM, 32-QAM and 64-QAM - are given. Simulation results show that the proposed algorithm achieves satisfactory performance.
Keywords :
blind equalisers; quadrature amplitude modulation; signal detection; QAM signal; cost function; joint blind equalization; quadrature amplitude modulation; signal detection algorithm; Adaptive equalizers; Blind equalizers; Cost function; Counting circuits; Detection algorithms; Higher order statistics; Intersymbol interference; Quadrature amplitude modulation; Quadrature phase shift keying; Signal detection; blind equalization; cost function; order detection;
Conference_Titel :
Imaging Systems and Techniques, 2009. IST '09. IEEE International Workshop on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-3482-4
Electronic_ISBN :
978-1-4244-3483-1
DOI :
10.1109/IST.2009.5071662
