Synchronization method for single carrier frequency domain equalization system and realization circuit thereof

Abstract

The invention discloses a synchronization method for a single carrier frequency domain equalization system, which comprises a multiplex technique and a bit synchronization method based on training characters. According to the method, three training characters are added at a frame head and used for completing various types of synchronization and signaling estimation algorithm, so that the load of the frame head is lowered, and effective transmission rate of data is improved. The invention discloses bit synchronization algorithm, and the algorithm is divided into an initial synchronism and accurate synchronization, after the range of the initial synchronism is confirmed, an accurate synchronization position is found out in the range by adopting accurate synchronization method, compared with a conventional bit synchronization method, other peak value of the algorithm can not exist out the range of the initial synchronization, and the algorithm has more accurate bit synchronization position judegement ability and has more high working efficiency.

Description

technical field [0001] The present invention relates to the field of wireless communication, such as wireless sensor network, broadband wireless communication system, etc., and in particular to a synchronization method based on Single Carrier System with Frequency Domain Equalization (SC-FDE) technology. Background technique [0002] Wireless communication has experienced rapid development from analog communication to digital communication, from FDMA to CDMA, and is an industry with the fastest technology update and the largest market capacity. With the development of wireless communication today, more and more services have put forward higher and higher requirements for data transmission rate, and the severe shortage of spectrum resources has increasingly become a bottleneck restricting the development of wireless communication. Although the second-generation mobile communication can be thousands of times faster than the existing transmission rate, it still cannot meet the ...

AI Technical Summary

Problems solved by technology

For the phase deviation of the sampling clock, after being transformed into the frequency domain by FFT, it is equivalent to the phase rotation of each symbol, which is multiplicative interference, which can be corrected by frequency domain equalization; the frequency deviation of the sampling clock is transformed into the frequency domain It is equivalent to the introduction of inter-carrier interference, which cannot be compensated by frequency domain equalization. Moreover, the signal after IFFT transformation back to the time domain also has bit synchronization errors, which greatly interferes with the decision.

In addition, the frequency offset (frequency offset) of the sampling clock will also cause the timing drift of the signal, affecting the performance of synchronization

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