The present invention provides a method, device and storage medium for frequency offset estimate, and the method for frequency offset estimate comprises: performing initial channel estimate by receiving an Sounding Reference Signal (SRS) or a Preamble code transmitted by a User Equipment (UE) to obtain a first frequency offset estimate value of a current sub-frame of the UE (S101); determining a frequency offset range in which the first frequency offset estimate value is located, and obtaining an initial frequency offset value corresponding to the first frequency offset estimate value according to the preset correspondence between the range of the frequency offset and the initial frequency offset value (S102); determining a phase difference of adjacent pilot positions based on a received pilot sequence included in the current sub-frame, and obtaining a dual pilot frequency offset estimate value according to the phase difference within the range limited by the initial frequency offset value corresponding to the first frequency offset estimate value (S103); and acquiring a frequency offset estimate value of the current sub-frame according to the initial frequency offset value corresponding to the first frequency offset estimate value and the dual pilot frequency offset estimate value (S104).

Methods and systems are described for frequency domain correction, time domain correction, and combinations thereof. Each Long Term Evolution (LTE) uplink residual frequency offset can be determined with less than 1 part per billion accuracy simultaneously and used for frequency offset correction. The disclosed method utilizes the same modulated signals for data and control as the 3GPP LTE wireless standard and can be embedded directly into the base station (downlink) PHY without additional hardware. The use of the disclosed methods provide multiple ways to simultaneously improve the uplink data throughput for every user in an LTE multiple access wireless system.

A multi-waveband OFDM receiver and a frequency offset compensation method and system are disclosed. The method includes: performing single waveband frequency offset estimation on an optical comb line of each order; classifying the optical comb lines into a low mutation optical comb line and a high mutation optical comb line; performing joint frequency offset estimation on the low mutation optical comb line; and performing compensation for a frequency offset of a radio frequency drive signal by using an estimated joint frequency offset. The present invention improves accuracy and reliability of the frequency offset estimation of the radio frequency drive signal, so that the degree of the compensation for the frequency offset of the radio frequency drive signal is more comprehensive and accurate.

A method and device for determining a time of arrival (TOA), a terminal device, and a non-transitory computer-readable storage medium are disclosed. The method may include: determining a detection start time on a correlation waveform based on a leading edge detection threshold; determining a noise threshold on the correlation waveform, and determining a quasi-TOA according to the detection start time; and determining the TOA according to data information in a target area of the correlation waveform and the noise threshold, where the target area is determined based on the quasi-TOA and a detection length.