Title :
Frequency Synchronization for MIMO OFDM-Based High Throughput Wireless LAN Systems
Author :
Zhang, Cheng ; Wang, Kuang ; Wang, Chuangang ; Xu, Yuanxin
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou
Abstract :
This paper proposes a post-FFT frequency synchronization algorithm for IEEE 802.11n based MIMO OFDM (multiple-input multiple-output orthogonal frequency division multiplexing) wireless LAN systems. The proposed synchronization algorithm uses preamble for rapid synchronization, and is thus suitable for burst mode transmission. The proposed method exploits receive diversity, which significantly improves the accuracy of the frequency offset estimation. Simulation results show that the proposed algorithm operates close to Cramer-Rao lower bound at high SNR, and is robust against multipath fading channels.
Keywords :
IEEE standards; MIMO communication; OFDM modulation; diversity reception; fading channels; fast Fourier transforms; frequency estimation; multipath channels; synchronisation; wireless LAN; Cramer-Rao lower bound; IEEE 802.11n based MIMO OFDM; MIMO OFDM-based high throughput wireless LAN systems; burst mode transmission; cyclic shift; frequency offset estimation; multipath fading channels; multiple-input multiple-output wireless LAN systems; orthogonal frequency division multiplexing; post-FFT frequency synchronization algorithm; rapid synchronization; receive diversity; Diversity methods; Fading; Frequency diversity; Frequency estimation; Frequency synchronization; MIMO; OFDM; Robustness; Throughput; Wireless LAN;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.140
