A new joint symbol synchronization and fine frequency offset estimation algorithm in IEEE 802.11n

作者：Huang Ming^*; Zeng Yong Bo; Li Zheng Ping; Luo Shou Shan; Xu Cheng Qian

来源：Journal of Beijing University of Posts and Telecommunications, 2012, 35(4): 59-63.

• Carrier frequency offsets
• Cross correlations
• Cyclic shifts
• Detection accuracy
• Frequency offset estimation
• IEEE 802.11n
• Local training
• MIMO-OFDM
• Received signals
• Symbol synchronization
• Synchronization method
• Synchronization performance

The introduction of cyclic shift delay (CSD) is used in IEEE 802.11n to distinguish different spatial streams, however it poses a challenge to synchronization. The traditional synchronization methods, which utilize the cross-correlation between the local training sequence and the received signal, will cause many spurious peaks and result in deteriorated synchronization performance. A new joint symbol synchronization and fine frequency offset estimation algorithm is proposed. It exploits the structure of IEEE 802.11n preamble and adopts a delay-correlation algorithm to eliminate the effect of CSD. The proposed algorithm has advantages in avoiding the effect of carrier frequency offset, suppressing the generation of spurious peak results and improving the detection accuracy.

• 出版日期2012
• 单位北京大学