| 空载波对STBC-OFDM系统信道估计性能的影响分析与改进 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 王轶 陶小峰 张平 |
| |
| 作者单位： | 泛网无线通信教育部重点实验室,北京邮电大学,北京,100876;北京邮电大学无线新技术研究所,北京,100876 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金重大项目 |
| |
| 摘 要： | 该文分析了空时分组码-正交频分复用(STBC-OFDM)系统中，空载波对基于离散傅里叶变换(DFT)信道估计的性能影响，推导得出空载波影响下信道估计均方误差及误码率的解析式，并提出一种新的信道估计方法，通过时域乘以干扰因子矩阵的逆消除空载波引起的混叠，提高信道估计精度。仿真结果与理论结果相符，且表明改进的信道估计算法有效消除均方误差地板现象，提高系统性能。
|
| 关 键 词： | 正交频分复用 信道估计 空时分组码 空载波 |
| 收稿时间： | 2007-11-5 |
| 修稿时间： | 2008-4-23 |
Performance Analysis and Enhancement of Channel Estimation for STBC-OFDM Systems with Virtual Subcarriers |
| |
| Wang Yi,Tao Xiao-feng,Zhang Ping.Performance Analysis and Enhancement of Channel Estimation for STBC-OFDM Systems with Virtual Subcarriers[J].Journal of Electronics & Information Technology,2009,31(3):640-644. |
| |
| Authors: | Wang Yi Tao Xiao-feng Zhang Ping |
| |
| Affiliation: | Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China; Wireless 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. |
| |
| Keywords: | Orthogonal Frequency Division Multiplexing (OFDM) Channel estimation Space Time Block Code (STBC) Virtual subcarriers |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《电子与信息学报》浏览原始摘要信息 |
|
点击此处可从《电子与信息学报》下载全文 |
