## Forums comp.dsp

## Show me the numbers

inBy popular demand, or at least a few requests, here are some empirical results comparing my frequency formula with Candan's. For the Noise,...

By popular demand, or at least a few requests, here are some empirical results comparing my frequency formula with Candan's. For the Noise, Dawg, and Candan columns, the first column is the average and the second column is the standard deviation. The data sets start out with the noiseless case and then there are increasing levels of noise. The values of the frequency are based on the 30 Hz wi...

## Filters for frequency inputs

inSuppose I have a frequency input* which produces a repeating oscillating error: *as in strobe from a stator on a motor or some such. 60...

Suppose I have a frequency input* which produces a repeating oscillating error: *as in strobe from a stator on a motor or some such. 60 45 60 45 60 45 60 45 Presume I am measuring a very stable sig gen of known frequency. So it should be: 52 52 53 52 52 52 52 53 53 52 Presume that it's mostly an artifact of measurement. It is, in other words, some sort of jitter, but it seems t...

## Question about DSP in Matlab (beginner)

inHi, I'm starting to learn DSP (Matlab )and I have two questions about it, maybe someone can help me out? I'm trying to measure a frequency...

Hi, I'm starting to learn DSP (Matlab )and I have two questions about it, maybe someone can help me out? I'm trying to measure a frequency from an Audio Device and I'm using FFT to transform it from the time domain to the frequency domain. But I am doing a downsample before the FFT. But you can also do it after the FFT. Do you know what would be the most efficient (before or after)? And why?...

## Request for Understanding Digital Signal Processing Errata

inCould someone send me a copy of the errata for Understanding Digital Signal Processing? I've got the 2nd Edition, 8th printing. Google led me...

Could someone send me a copy of the errata for Understanding Digital Signal Processing? I've got the 2nd Edition, 8th printing. Google led me here - I couldn't find where it lives on the web. Thanks, Bill Mason _____________________________________ Do you know a company who employs DSP engineers? Is it already listed at http://dsprelated.com/employers.php ?

## Old DSP Instructional videos on VHS tapes

inHi, In Julius' 5/18/15 reply to my post (Subject: An interesting historical DSP article) he mentioned the existence of old DSP...

Hi, In Julius' 5/18/15 reply to my post (Subject: An interesting historical DSP article) he mentioned the existence of old DSP instructional videos recorded on VHS tapes. As it turns out, I own the following VHS tapes: IEEE IEDM-DSP "Fundamentals of DSP" (Part 1 of 4) by a Ronald Schafer IEEE IEDM-DSP "Applications of DSP" (Part 2 of 4) by a James McClellan...

## Heading estimation from Magnetometer data

inHello All, The goal is to estimate heading from Magnetometer data and subtract it from the heading obtained from Gyro data to estimate heading...

Hello All, The goal is to estimate heading from Magnetometer data and subtract it from the heading obtained from Gyro data to estimate heading bias. Now, I can obtain heading from Gyro data by integrating it but how do I obtain it from Magnetometer data? Many thanks. sia --------------------------------------- Posted through http://www.DSPRelated.com

## audio loop with c6713

Hello, I am trying to do a simple audio loop (playpack loop) using only the McBSP with TI C6713. I must mention, I am new to the DSP world and...

Hello, I am trying to do a simple audio loop (playpack loop) using only the McBSP with TI C6713. I must mention, I am new to the DSP world and I would very much appreciate any help. I am working with DSP/BIOS and with CSL functions. So this is what I have done so far: I have programed 2 hardware interrupt functions, one for receive and one for transmit. I have connected my laptop to t...

## Normalizing the magnitude of Goertzel Filter c#

I'm trying to detect some frequencies of 18Khz with sample rate of 44100 [samples/sec]. When I pass a buffer(~4500 samples) to the algorithm it...

I'm trying to detect some frequencies of 18Khz with sample rate of 44100 [samples/sec]. When I pass a buffer(~4500 samples) to the algorithm it returns a magnitude in a very strange range. Sometimes i get 0.1, or 7 or 250(!) or 154 or 25000 - very strange. I can't decide on a threshold boundary for the filter. Is there any way noramlizing that result? (My result is the magnitude of the complex ...

## How/Why a digital signal is inherently more immune to noise?

inThe primary advantage of digital transmission over analog transmission is Noise Immunity. A digital signal (in comparison to an analog signal)...

The primary advantage of digital transmission over analog transmission is Noise Immunity. A digital signal (in comparison to an analog signal) is inherently more immune to noise. Why the word "inherent"? Please make it more clear to me. --------------------------------------- Posted through http://www.DSPRelated.com

## Digital Upconversion using the baseband data(IQ) files

inHi all, i want to upconvert the baseband data (complex data). i have code for upconverting but struggling to implement interpolater...

Hi all, i want to upconvert the baseband data (complex data). i have code for upconverting but struggling to implement interpolater (resampler) before upconverter and i need to implement a filter after the upconverter. so can any one help me to implement both resampler and filter . Iam trying to upconvert a baseband to 70Mhz IF . Thanks in advance.