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| Frequency Ambiguity Resolution Algorithm for OFDM Systems Based on Phase Differential Modulation between Adjacent Symbols |
| Zeng Rong; Zhao Chun-ming |
| National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China |
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Abstract OFDM systems are sensitive to the frequency offset. In this paper, a novel frequency ambiguity resolution algorithm in OFDM systems based on phase differential modulation between adjacent symbols is proposed to correct the frequency ambiguity. The sufficient condition for the proposed algorithm to achieve unique identifiability is deduced. Moreover, the computational complexity of the proposed algorithm and the sensitivity of the proposed algorithm to the timing error are also analyzed in the paper. Theoretical analysis and computer simulations show that the proposed algorithm has the low complexity advantage over conventional algorithm while maintaining approximately the same performance.
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Received: 27 October 2003
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2005, Vol. 27 
