Data domain based frequency offset estimation and correction method and system
A technology of frequency offset estimation and correction method, applied in the field of frequency offset estimation and correction based on data domain, can solve the problems of low performance, complex algorithm process, occupation of spectrum resources, etc., to ensure consistency, improve accuracy, and reliable frequency. The effect of biased estimates
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Embodiment 1
[0049] Such as figure 1 As shown, a frequency offset estimation and correction method based on the data domain includes the following steps:
[0050] S1: Perform analog-to-digital conversion on the signal received by the IEEE802.11 MIMO-OFDM system antenna to obtain a high-throughput mixed-format preamble short training sequence;
[0051] S2: Using the short training sequence of the high-throughput mixed-format preamble to estimate the signal-to-noise ratio and obtain the correlation coefficient ρ;
[0052] S3: Perform rough symbol timing synchronization and coarse frequency offset estimation and correction on the short training sequence of the high-throughput mixed-format preamble, and then perform the operation of removing the high-throughput preamble on the obtained signal to obtain the OFDM signal sequence in the high-throughput data domain ;
[0053] S4: Using the correlation coefficient ρ, finely synchronize the symbol timing of the OFDM signal sequence in the high-thr...
Embodiment 2
[0089] Such as image 3 As shown, a frequency offset estimation and correction system based on the data domain ( image 3 inside the dashed box), including:
[0090] The analog-to-digital conversion module is used to perform analog-to-digital conversion on the signal received by the antenna of the IEEE802.11 MIMO-OFDM system to obtain a high-throughput mixed-format preamble short training sequence;
[0091] The signal-to-noise ratio calculation module uses analog-to-digital conversion to obtain a high-throughput mixed-format preamble short training sequence to estimate the signal-to-noise ratio to obtain a correlation coefficient;
[0092] The symbol timing coarse synchronization module is used to calculate the symbol timing coarse synchronization by converting the analog-to-digital conversion to the short training sequence of the high-throughput mixed format preamble;
[0093] The coarse frequency offset estimation and adjustment model module is used to calculate the coarse...
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