A High-precision Frequency Offset Estimation Method Adapted to Low SNR Environment
A technology of frequency offset estimation and low signal-to-noise ratio, applied in the field of wireless communication, can solve the problems of IQ imbalance and inapplicability, and achieve the effect of accurate estimation accuracy
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[0029] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0030] The present invention provides a high-precision frequency offset estimation method suitable for a low signal-to-noise ratio environment. A specific embodiment in DSSS system communication will be described in detail below with reference to related drawings.
[0031] After down-conversion, the received signal with carrier frequency offset is:
[0032]
[0033] Where a(k) is the pseudocode signal, Δω is the frequency o...
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