IFFT Example 1: 1D Signal - Teradata Vantage

In this example, the signals are one-dimensional (1D).

Input

• inputtable: fft_output1, output by FFT Example 1: 1D Signal

SQL Call

CREATE MULTISET TABLE ifft_output_table1 AS (
  SELECT * FROM IFFT (
    ON fft_output1 AS inputtable PARTITION BY id_0 ORDER BY timestep
    USING
      ValueColumns ('real_value1', 'imag_value1')
      NumDimensions (1)
      IsSignalRealValued ('false')
  ) AS dt
) WITH DATA;

Output

This query returns the following table:

SELECT * FROM ifft_output_table1 ORDER BY id_0, timestep;