① 泛网无线通信教育部重点实验室(北京邮电大学) 北京 100876;②北京邮电大学无线新技术研究所 北京 100876
Performance Analysis and Enhancement of Channel Estimation for STBC-OFDM Systems with Virtual Subcarriers
Wang Yi①②; Tao Xiao-feng①②; Zhang Ping①②
① Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China; ②Wireless Technology Innovation Institute, Beijing 100876, China
Abstract:Performance of Discrete Fourier Transform (DFT) based channel estimation for Space Time Block Code-Orthogonal Frequency Division Multiplexing (STBC-OFDM) systems with virtual subcarriers is analyzed. The concise expressions for Mean Squared Error (MSE) and corresponding Bit Error Rate (BER) with the effect of virtual subcarriers are provided. Besides, a new channel estimation method based on zero-forcing is presented to eliminate aliasing distortion caused by virtual subcarriers. Simulation results demonstrate the accuracy of the analysis and the efficiency of new method.
王 轶; 陶小峰; 张 平. 空载波对STBC-OFDM系统信道估计性能的影响分析与改进[J]. 电子与信息学报, 2009, 31(3): 640-644 .
Wang Yi①②; Tao Xiao-feng①②; Zhang Ping①②. Performance Analysis and Enhancement of Channel Estimation for STBC-OFDM Systems with Virtual Subcarriers. , 2009, 31(3): 640-644 .