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About Butterworth IIR filter ^_^ [6 articles]

Hello Masters: When I develop a Butterwoth IIR filter. there is a strange phnomenon. After filter a standard sine signal with it, noise signal has been removed. but the amplitudes/peaks of ea...

fake bass and the missing fundamental [24 articles]

This is probably not the right group, but a lot of people here seem pretty deep in acoustics, so I'll proceed ... The ear has a characteristic that if you ply a series of harmonically- related to...

Combining smaller FFTs [3 articles]

I have followed a previous post where a decimation in time (DIT) method had been used to combine two half-size FFTs into a full size FFT. I tried to adapt this method by using a Decimation In Frequen...

Trace-back clock in viterbi [4 articles]

Hi all, I have this doubt in implementation of viterbi decoder in FPGA While the trace-back unit decodes the single bit after tracing back the path of length 5*L, next input to the viterbi d...

Generating Maximum Length Sequence using Galois LFSR [2 articles]

Hello-- I am trying to generate a Maximum Length Sequence (MLS) using a Linear Feedback Shift Register (LFSR). Assuming that the taps have been loaded into variable "taps," and that "lfsr" is ...

Thank you, Jerry [2 articles]

Would you please clarify it in more detail? Do you mean that the value has over flow for the Long type (the type of Y(j) is Long)? ...

Someone help me about LP filter of sinc-window FIR? [3 articles]

I use window-sinc to build a FIR LP filter. the original signal is a sin wave with high frequency noise by adding a random signal. the target is to remove the noise, but after filter, the signal almos...

OT: The Truth About DARPA [48 articles]

Hi All, I am on the downslope of disillusionment regarding the truth of US- Government-funded research. I could pick any from a broad array of such insitutions and tell you of utterly-perplexing ...

BLAS vs VSIPL [2 articles]

All, I need to write some code that is portable in C to do some signal processing. I've only used MATLAB in the past. Can someone give me some insight into using BLAS. Would it be a better choic...

Zero padding FFTed cross correlation [6 articles]

Hello, I try to make a cross correlation when using the FFT to speed up (in contrast to the normal O(n^2) method). First I did not zero-pad because changes from the pictures are small. It worked....