Rick Lyons

Richard Lyons has been the Lead Hardware Engineer for numerous multi-million dollar signal processing systems for both the National Security Agency (NSA) and TRW (now Northrop Grumman). An experienced lecturer and instructor at the University of California Santa Cruz Extension, he has delivered signal processing seminars and training courses for Besser Associates throughout the US and Europe to companies such as Motorola, Lockheed-Martin, Texas Instruments, Nokia, Honeywell, Qualcomm, National Semiconductor, Northrop Grumman, Sandia National Laboratories, Wright-Patterson Air Force Base, etc. He has written numerous articles on DSP topics, and authored the top selling DSP book Understanding Digital Signal Processing, now in its third edition. Lyons is the primary contributor to, and Editor of, the book Streamlining Digital Signal Processing: A Tricks of the Trade Guidebook. He is an Associate Editor of the IEEE Signal Processing magazine, where he created and edits the "DSP Tips & Tricks" column; and a member of Eta Kappa Nu, the electrical engineering honor society. He received the 2007 IEEE Signal Processing Magazine Best Column Award and the IEEE Signal Processing Society's 2012 Education Award.

Rick Lyons on Using the Forward FFT Algorithm to Compute the IFFT

Instructor Rick Lyons has written a new post on his blog at DSP Related discussing ways that you can use an FFT algorithm to compute the IFFT.

If you need to compute inverse fast Fourier transforms (inverse FFTs) but you only have forward FFT software (or forward FFT FPGA cores) available to you, below are four ways to solve your problem.

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New Post Regarding Goertzel Filters from Rick Lyons on DSPRelated

Instructor Rick Lyons has written a new post on his blog at DSPRelated.com:

I noticed the Wiki web site stated that a Goertzel filter:

"...is marginally stable and vulnerable to
numerical error accumulation when computed using
low-precision arithmetic and long input sequences."

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