Method for achieving wireless communication timing coarse synchronization by using 1bit quantification and hard decision

Abstract

The invention relates to a method for achieving wireless communication timing coarse synchronization by using 1bit quantification and hard decision and belongs to the technical field of wireless mobile communication synchronization. The method is characterized by comprising the following steps that: a receiving end firstly carries out 1bit quantification on a demodulated signal; after being quantified, the signal is subjected to matched filtering by a matched filter; and a filtering result is directly compared with a fixed threshold value to search for a synchronous head so as to realize timing coarse synchronization. The scheme can effectively solve the false-alarm problem caused by the frequently and greatly faded signal under the multi-user and multipoint access condition by using a data frame. Meanwhile, the amplitude dynamic range of the filtering result is narrower, and the decision threshold value can be constant without self-adaptation. Moreover, after quantification, only 1bit information exists so as to effectively reduce calculated quantity and reduce the complexity of a synchronization module.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication synchronization, and relates to a timing coarse synchronization method suitable for a wireless communication system. Background technique [0002] In wireless communication systems, the acquisition of timing synchronization is very important. The receiving end needs to overcome factors such as channel time selectivity, frequency selectivity, and other user interference to complete synchronization accurately, and then complete a series of follow-up operations such as FFT and channel estimation. Therefore, accurate synchronization is a prerequisite for completing follow-up work. Timing synchronization is usually completed by timing coarse synchronization and timing fine synchronization. The timing coarse synchronization is mainly used to detect the arrival of data frames, and the timing fine synchronization is mainly to detect the precise position of the frame header to determi...

AI Technical Summary

Problems solved by technology

Due to the large dynamic range of the filtering result after multi-bit quantization, the coarse synchronization threshold requires a relatively complex adaptive process; at the same time, for a communication system that uses data frames to achieve multi-user and multi-point access, due to the burstiness of data services and The interference of other users in the same frame makes multi-bit quantization often have false alarms

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