Synchronization and channel estimation for MIMO OFDM wireless LAN systems |
| |
Authors: | LU Zhen and GE Jian-hua |
| |
Affiliation: | 1. Dept. of Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China2. State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China) |
| |
Abstract: | A new preamble structure is designed for wireless LAN based on MIMO OFDM systems, which can be used for both synchronization and channel estimation. Modulatable orthogonal polyphase sequence is utilized in training symbol design regarding its correlation properties. The time synchronization and channel estimation are achieved by measuring the correlation between the Received training sequence and the locally generated training sequence. Repeated training symbols are used to get carrier frequency offset(CFO)estimation. It is shown from the analysis that the accuracy of frequency synchronization is close to the Cram6r-Rao lower bound.The training sequences are optimal for channel estimation based on the minimum mean square error(MMSE). |
| |
Keywords: | synchronization channel estimation MIMO OFDM wireless LAN |
本文献已被 CNKI 维普 万方数据 等数据库收录! |
| 点击此处可从《哈尔滨工业大学学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《哈尔滨工业大学学报(英文版)》下载全文 |