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Full-range pilot-assisted frequency offset estimation for OFDM communication systems
Full-range pilot-assisted frequency offset estimation for OFDM communication systems
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机译:OFDM通信系统的全范围导频辅助频率偏移估计
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摘要
A training symbol with two identical halves as well as a pilot-tone at a center frequency is used for both timing synchronization and carrier frequency offset estimation. A timing synchronization is achieved by finding a peak of a cross-correlation function of the two halves in the first symbol. A fraction part of the frequency offset FO is then calculated from a phase difference between the two halves of the first training symbol. Then, the received signal is compensated for the fraction part of FO, and, an integer part of the FO is obtained by counting the shifted positions of the pilot-tone peak in the frequency domain.
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