LTE uplink timing synchronization tracking method

Abstract

The invention discloses an LTE uplink timing synchronization tracking method, and mainly solves the problems of large calculation amount during a timing synchronization process and low timing performance under a low signal to noise ratio in the prior art. The method comprises the following implementation steps: (1) generating a detecting reference signal by a terminal according to the bandwidth requirement of a system, mapping the detecting reference signal into a data signal in an interlacing manner and transmitting the data signal; (2) extracting a real part and an imaginary part of the received data signal by a base station, respectively performing cross-correlation operation on the real part and the imaginary part of the received data signal and the real part and the imaginary part of a known detecting reference signal, and adding a real part correlation operation result to an imaginary part correlation operation result; (3) finding a maximum peak position, namely the initial position of the detecting reference signal, in a timing metric function by utilizing a peak joint detection method. According to the method, cross-correlation is performed on each of the real part and the imaginary part of the detecting reference signal, and the peak joint detection is performed on the correlation operation results, so that the timing performance is high in a low signal to noise ratio environment; the calculation amount is greatly reduced; the real-time performance of a transmission system is improved; the method can be used in mobile communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and further relates to a long-term evolution LTE uplink timing synchronization tracking method, which can be used in mobile communication. Background technique [0002] In recent years, with the progress of society and the development of science and technology, people have higher and higher requirements on the transmission rate and service quality of mobile communication. However, the bandwidth and service quality provided by the existing mobile communication system are gradually unsatisfactory for people. Therefore, the 3rd Generation Partnership Project 3Gpp proposed the Long Term Evolution (LTE) project at the end of 2004. In the LTE system, the SC-FDMA technology is mainly used in the uplink direction, which effectively reduces the peak-to-average power ratio of the transmitter and reduces the size and cost of the terminal. Similar to Orthogonal Frequency Division Multiple Acc...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it needs to obtain the average of multiple time offset instantaneous values, which makes the synchronization process a large amount of calculation and high complexity, ignoring the real-time requirements of mobile communication

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