SC-FDM system time frequency synchronizer and synchronization method

Abstract

The invention discloses an SC-FDM (single-carrier Frequency-division multiple) system time frequency synchronizer and a synchronization method, mainly solving the problems of a low energy utilization rate, a small frequency offset estimation scope and low estimation precision in the prior art. The synchronizer comprises a delay correlation selection module, a fine frequency compensation module, a coarse frequency compensation module and a time refinement processing module. The synchronization method comprises the following steps: (1) employing Chu sequence with a communication system to construct SC-FDM signal frame; (2) processing the signal to obtain a time coarse synchronization position; (3) carrying out phase extraction and fractional frequency offset compensation treatments on a signal coarse synchronization point; (4) obtaining integer frequency offset of the signal and carrying out integer frequency offset compensation treatment on the received signal; (5) utilizing local training sequence to process the signal and obtain a precise beginning time of the signal. The synchronization method provided in the invention has the advantages of a high energy utilization rate, a large frequency offset estimation scope and high estimation precision, and is suitable for the uplink of a high speed mobile communication system in an LTE (Long Term Evolution) standard.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a time-frequency synchronization device and a time-frequency synchronization method of a single-carrier frequency-division multiplexing (single-carrier Frequency-division multiplxing, SC-FDM) system in ultra-high-speed mobile wireless communication, which can be used for In the time-frequency synchronization module of the ultra-high-speed mobile wireless communication system, the time-frequency synchronization of signals received by ultra-high-speed mobile users is realized. Background technique [0002] In an ultra-high-speed communication system, the ultra-high-speed and high-dynamic movement of the mobile station causes rapid changes in wireless channel characteristics and a large dynamic Doppler shift. In the international long-term evolution (Long Term Evolution, LTE) standard, the uplink of ultra-high-speed mobile communication adopts single-carrier frequency-di...

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Problems solved by technology

[0004] The disadvantage of this method is that in ultra-high-speed mobile communication systems, mobile stations are generally powered by batteries, and the problem of excessive peak-to-average ratio of OFDM transmission technology limits the energy utilization efficiency of the system. Therefore, this method is not applicable. SC-FDMA transmission technology used in the uplink of ultra-high-speed mobile communication systems

[0006] The disadvantage of this me

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