Gabor transform
But if the total bandwidth available is 5 Hz, other frequency bands except "x"("t") are wasted. Through time–frequency analysis by applying the Gabor transform, the available bandwidth can be known and those frequency bands can be used for other applications and bandwidth is saved. The right side picture shows the input signal "x"("t") and the output of the Gabor transform. As was our expectation, the frequency distribution can be separated into two parts. One is "t" ≤ 0 and the other is "t" &gt; 0. The white part is the frequency band occupied by "x"("t") and the black part is not used. Note that for each point in time there is both a negative (upper white part) and a positive (lower white part) frequency component.