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Synchronization is one of the key technologies in frequency-hopping (FH) communication systems. Among four FH synchronization methods, synchronization-word (SW) is the most widely used but is still likely to be interfered. By combining SW with time of day (TOD), anti-reconnaissance capability is improved, but it takes relatively much more time to synchronize and cannot be used in Fast Frequency Hopping...
The paper proposes a novel approach for fine frequency synchronization of OFDM synchronization systems in multi-path channels. Maximum Likelihood (ML) function of frequency offsets including integral and decimal parts in frequency domain is developed according to the law of great number to eliminate the noise impact of the signal. When the timing delay close to the actual time, the proposed function...
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