Synchronization method, device and equipment of broadband wireless communication system and storage medium

Abstract

The invention discloses a synchronization method suitable for a broadband wireless communication system. A synchronous sequence with a special repetitive structure is generated by multiplying a certain section of an original repetitive structure synchronous sequence by a spread spectrum sequence; the receiving end multiplies the received time domain sampling signal by the same spread spectrum sequence of the transmitting end for despreading, then calculates a delay autocorrelation function of the received signal, and realizes symbol timing synchronization and frequency offset estimation through peak detection of the delay autocorrelation function; In the process, the precision of symbol timing and frequency offset estimation is ensured by repeating the structure delay autocorrelation sharppeak value, the influence of noise and interference signals on the peak value of the delay autocorrelation function is reduced through spectrum spreading, and compared with a traditional delay autocorrelation synchronization algorithm, the robustness on the interference and the noise can be obviously enhanced. The invention further discloses a synchronizing device and equipment suitable for the broadband wireless communication system and a computer readable storage medium, and the technical effects can also be achieved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication systems, and more specifically, to a synchronization method, device, equipment and computer-readable storage medium suitable for broadband wireless communication systems. Background technique [0002] In recent years, whether it is civil communication or military communication, the transmission capacity of the system has been increasingly required, and the theory and technology of broadband wireless communication have made great progress. Transmission systems such as OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), SCFDE (Single Carrier-Frequency Domain Equalization, single carrier frequency domain equalization) have become two typical transmission schemes of current broadband wireless communications, and system synchronization is One of the key factors affecting system performance. Since OFDM and SCFDE systems have many similarit...

AI Technical Summary

Problems solved by technology

However, the current method based on time-delayed autocorrelation function peak detection has the following two main problems: First, under the condition of low signal-to-noise ratio, the peak value of autocorrelation function is easily affected by factors such as noise, and the detection accuracy is reduced , in order to ensure the accuracy of detection, it is generally necessary to increase the length of the training sequence, thereby reducing the transmission efficiency of the system; second, when the system is interfered, these methods are basically no longer applicable, because the interference signal (for example, single-tone interference, multiple Tone interference, etc.) also often have a repetitive structure, and some interference peaks will appear in the autocorrelation function, which will cause the peak detection of autocorrelation to fail

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