FRAME SYNCHRONIZATION METHOD AND APPARATUS

摘要

Embodiments of the present invention provide a frame synchronization method and apparatus, which can reduce impact of a carrier frequency offset. In those embodiment, a solution is provided and the solution includes: obtaining a received signal of a receiving antenna; calculating an auto-correlation value of the received signal and determining a time corresponding to the auto-correlation value that is of the received signal and that meets a first preset condition, as an initial estimation time; obtaining a carrier frequency offset estimation value according to the initial estimation time, the received signal, and a frequency offset estimation algorithm, and performing frequency offset compensation on the received signal by using the carrier frequency offset estimation value; calculating a cross-correlation value and an auto-correlation value of the received signal on which the frequency offset compensation has been performed. The embodiments of the present invention are used for frame synchronization.

主权项

1. A frame synchronization method, comprising:
obtaining a received signal of a receiving antenna; obtaining an auto-correlation value of the received signal according to the received signal and an auto-correlation algorithm; determining a time corresponding to the auto-correlation value that is of the received signal and that meets a first preset condition, as an initial estimation time; obtaining a carrier frequency offset estimation value according to the initial estimation time, the received signal, and a frequency offset estimation algorithm, and performing frequency offset compensation on the received signal by using the carrier frequency offset estimation value; obtaining, according to the received signal on which the frequency offset compensation has been performed, a preamble signal that is sent by a transmitting antenna and that meets a second preset condition, a cross-correlation algorithm, and the auto-correlation algorithm, a cross-correlation value and an auto-correlation value of the received signal on which the frequency offset compensation has been performed; and determining a time corresponding to the cross-correlation value and the auto-correlation value that are of the received signal on which the frequency offset compensation has been performed and that meet a third preset condition, as a frame synchronization time, and demodulating data according to the frame synchronization time to complete frame synchronization.