Frequency point blind search method and terminal

Abstract

The embodiment of the invention discloses a frequency point blind search method and a terminal, and aims to reduce the quantity of samples needed by frequency point blind search and increase the frequency point blind search efficiency. The method in the embodiment of the invention comprises the following steps: generating a first training sequence corresponding to a first center frequency point by the terminal; acquiring each frequency offset rotating factor of each frequency point relative to the first center frequency point in a second frequency point set; generating a second training sequence set according to each frequency offset rotating factor and the first training sequence; calculating the correlation value of the first center frequency point and the correlation value of each frequency point in the second training sequence set respectively according to received first reception data of the first center frequency point, the first training sequence and the second training sequence set; calculating the measured value of each frequency point according to the correlation value of each frequency point; and performing frequency point blind search according to the measured value of each frequency point.

Description

technical field [0001] Embodiments of the present invention relate to the field of mobile communications, and in particular, to a method and terminal for blind frequency point search. Background technique [0002] In wireless communication, when the terminal is turned on or the signal loses coverage, when there is no frequency point information of the historical cell or the frequency point information of the historical cell is invalid, in order to avoid possible frequency points agreed by the agreement on the entire frequency band (this agreement agreed Possible frequency points, which are clearly determined by the concept of frequency band in the agreement, frequency point fence interval, system bandwidth, etc.) will try to reside, and will start the search for frequency points on the frequency band, on the premise of not missing the frequency point of the real signal as much as possible Next, screening or sorting the possible frequency points agreed in the agreement, this ...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, when the frequency point blind search is carried out in this way, only when the receiving frequency point is the center frequency point of the actual signal and the receiving bandwidth matches the signal bandwidth, the correlation of the local sequence can be reflected, so that The receiver must scan each frequency point, resulting in too many samples required for frequency point blind search, which increases the burden on the frequency point blind search system

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