Sinc Interpolation for Further Improvement in Frequency Estimation Using Three DFT Samples

Table 2

The proposed frequency estimation method for small sample values.

Step 1	(i) Search the peak sample from the N-point DFT and its left and right neighbors; , and
Step 2	(i) If calculated from (1) is , recalculate the correction factor from the following equation:
Step 3	(i) If calculated from (1) is , recalculate the correction factor from the following equation:
Step 4	(i) Calculate and as follows: and , for normalized frequency