US 12,278,630 B2
Fast fourier transform (FFT) based digital signal processing (DSP) engine
Volker Mauer, Princes Risborough (GB)
Assigned to Altera Corporation, San Jose, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Sep. 24, 2021, as Appl. No. 17/484,463.
Prior Publication US 2022/0014199 A1, Jan. 13, 2022
Int. Cl. G06F 17/14 (2006.01); H03K 19/0175 (2006.01); H03K 19/17728 (2020.01); H03K 19/17736 (2020.01)
CPC H03K 19/17728 (2013.01) [G06F 17/142 (2013.01); H03K 19/017581 (2013.01); H03K 19/1774 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A digital signal processing (DSP) block comprising:
a Fast Fourier Transform (FFT) unit configured to perform an FFT operation, the FFT unit comprising:
a first FFT engine configured to convert a signal between a time-domain and a frequency-domain, wherein the first FFT engine is a fixed size FFT engine; and
a second FFT engine communicatively coupled to the first FFT engine, wherein the second FFT engine is a variable size FFT engine.