Wireless communication method, device and system, transmitting end and receiving end

Abstract

The invention provides a wireless communication method, device and system, a transmitting end and a receiving end, and relates to the technical field of wireless communication. The method comprises the following steps: obtaining communication parameters, and calculating according to the communication parameters to obtain a chip Doppler frequency shift between the transmitting end and the receiving end; determining a target sending rate of the transmitting end or a target receiving rate of the receiving end according to the chip Doppler frequency shift and the standard rate; and the transmitting end transmitting the target signal to be transmitted to the receiving end according to the target transmitting rate, so that the receiving end receives the target signal according to the standard rate, or the receiving end receives the target signal transmitted by the transmitting end according to the standard rate according to the target receiving rate. In this way, for the transmitting end and / or the receiving end moving at a high speed, the target transmitting rate is adopted at the transmitting end for signal transmitting or the target receiving rate is adopted at the receiving end for signal receiving, the influence of Doppler frequency shift is reduced, the frequency estimation precision is improved, and intersymbol interference is avoided to a certain degree.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a wireless communication method, device, system, transmitting end and receiving end. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has been widely used in recent years. Due to the introduction of a cyclic prefix, OFDM can tolerate certain symbol timing errors. In an OFDM-based communication system, a variety of technologies are used in the signal synchronization and tracking process. For example, the receiver can use the correlation method to detect the frame synchronization sequence to determine the starting position of each standard time slot; The precise space-time references of both parties roughly estimate the arrival time of the frame header and determine the starting position of the standard time slot. [0003] In an OFDM-based high-speed mobile communication sy...

AI Technical Summary

Problems solved by technology

[0003] In an OFDM-based high-speed mobile communication system, one or both parties in the communication are in a high-speed mobile state, and the high-speed movement causes Doppler frequency shift of the signal, and the transmission time of each frame may be different. At this time, not only the carrier wave will occur Frequency shift, the chip will also have a certain rate offset, resulting in the change of the information frame length. When the frame length change exceeds the symbol timing error that the OFDM cyclic prefix can tolerate, the problem of intersymbol interference will occur.

Images