Scheme for high-speed real-time DFT operation for radar signal processing

A scheme of high-speed real-time discrete Fourier transform (DFT) operation is presented for processing radar signals. It may be used to calculate the 8, 16, or 32-point DFT. When 10 MHz clock frequency is used, the operation time per point is about 4 mu s for the complex signal input sequence of 16 bits of wordlength. Under the fixed time-domain weighting adopted, it does not require more equipment or additional operation time. The control circuit is very simple. The shorter the word length of the input sequence, the faster the operation speed.