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| A Detection Algrithm Based on Joint Time and Frequency Offset Estimation for OFDM in HF Communications |
| Kan Chun-rong①;Wang Ting-chang② |
| ①Institute of Communication Engineering PLA UST, Nanjing 210007, China;②The 63rd Research Institute, PLA General Staff Headquarters, Nanjing 210007 China |
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Abstract Against the character of HF channels, this paper presents an OFDM synchronization detection scheme, which uses m sequence to modulate the pilot symbols. Based on joint time and frequency-offset estimation, synchronization detection can be implemented using the correlation peak of the m sequence in low SNR. Theoretical analysis shows the right selection of range for decision threshold. Monte Carlo simulation results show the scheme has good performance with a reliable detection probability and a low false alarm probability under low SNR( - 10dB).
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Received: 29 December 2003
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2005, Vol. 27 
