多天线OFDMA信号盲解码算法研究.pdfVIP

Open Journal of Circuits and Systems 电路与系统, 2017, 6(1), 8-20 Published Online March 2017 in Hans. /journal/ojcs /10.12677/ojcs.2017.61002 Blind Decoding for Multi-Antenna OFDMA Signal 1 1,2 2 Yu Han , Lei Shen , Yanyan Bu 1 Science and Technology on Communication Information Security Control Laboratory, Jiaxing Zhejiang 2 School of Communication Engineering, Hangzhou Dianzi Univeristy, Hangzhou Zhejiang th th st Received: Mar. 11 , 2017; accepted : Mar. 24 , 2017; published: Mar. 31 , 2017 Abstract Multi antenna asynchronous OFDMA (Orthogonal Frequency Division Multiple Access) signal de- coding algorithm based on independent component analysis is proposed in this paper. According to the characteristics that OFDMA signal can be regarded as the subspace projection of the user signal in the IFFT (Inverse Fast Fourier Transform) matrix, the proposed method can be used for subcarrier separation and decoding without channel information and transmission delay by mak- ing the received signal as a form of blind source separation. The proposed blind decoding method based on fast independent component analysis does not need to remove the cyclic prefix, which increases the energy of the received signal. As such, the decoding performance is improved. Com- pared with the traditional MMSE decoding method based on FFT, theoretical analysis and simula- tions show that the proposed method has better performance. Keywords OFDMA, Independent Component Analysis, Carrier Estimation, Bind Decoding 多天线OFDMA信号盲解码算法研究 1 1,2 2 韩 煜 ，沈 雷 ，卜燕燕 1通信信息控制和安全技术重点实验室，浙江 嘉兴 2杭州电子科技大学通信工程学院，浙江 杭州 收稿日期：2017年3月11 日；录用日