Carrier frequency offset estimation method and system
AssigneeIndustrial Technology Research Institute
InventorsJiun-Yo Lai, Jen-Yuan Hsu, Chin-Hung Chen, Pang-An Ting
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Abstract
In one aspect of the invention, a carrier frequency offset (CFO) estimation method to estimate a CFO value of a received signal is provided, and the method comprises: receiving a preamble signal which includes several non-perfect repeat segments; applying an interpolation procedure to interpolate the perfect repeat point of one segment compared with the next segment or the previous segment; acquiring a delay correlation value based on the two perfect repeat signal segments and estimating the CFO value based on the delay correlation value.
Claims24
A carrier frequency offset estimation method to estimate a carrier frequency offset value of a received signal, comprising:
- receiving a preamble signal including a first repeat signal segment and a second repeat signal segment;
- applying an interpolation procedure on the first repeat signal to generate a first signal;
- and
- acquiring a delay correlation value based on the first and the second repeat signals and estimating the carrier frequency offset value based on the delay correlation value.
A carrier frequency offset estimation system to estimate a carrier frequency offset value of a received signal comprising a first repeat signal and a second repeat signal, the system comprising:
- a conjugate signal generator comprising an interpolation filter and a computing unit, receiving the first repeat signal to generate a first conjugate signal corresponding to the second repeat signal by the interpolation filter and the computing unit;
- a first multiplier to calculate a first product of the second repeat signal and the first conjugate signal;
- and
- a carrier frequency offset estimator to estimate the carrier frequency offset value based on the first product.
Dependencies are inferred from the claim text.