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Digital Upconversion using the baseband data(IQ) files

Started by Anonymous in comp.dsp2 hours ago 22 replies

Hi 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.


How Shit Happens

Started by robert bristow-johnson in comp.dsp6 hours ago 3 replies

In the beginning was the Plan. And then came the Assumptions. And the Assumptions were without form. And the Plan was without...

In the beginning was the Plan. And then came the Assumptions. And the Assumptions were without form. And the Plan was without substance. And darkness was upon the face of the Workers. And the Workers spoke among themselves, saying, "This is a crock of shit, and it stinks." And the Workers went unto their Supervisors and said, "It is a pail of dung, and we can't live with the ...


Old DSP Instructional videos on VHS tapes

Started by Rick Lyons in comp.dsp7 hours ago 8 replies

Hi, 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...


Request for Understanding Digital Signal Processing Errata

Started by wmason in comp.dsp7 hours ago 6 replies

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...

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 ?


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

Started by a.s. in comp.dsp13 hours ago 26 replies

The 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


Question about DSP in Matlab (beginner)

Started by JCO_DSP in comp.dsp23 hours ago 84 replies

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...

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?...


Scaling Coefficients to unity peak

Started by spetcavich in comp.dsp2 days ago 3 replies

I had this exercise to design a filter using the remez algorithm in matlab and without coefficient scaling I quantized them to N bits and...

I had this exercise to design a filter using the remez algorithm in matlab and without coefficient scaling I quantized them to N bits and then scaled them to unity peak and compared these spectrums to each other. The spectrum without scaling did not meet specifications for stop band attenuation while the scaled did. I get that scaling the coefficients maximizes the value range the coefficient...


PSD of a sequence of independent random PAM symbols ?

Started by Usjes in comp.dsp2 days ago 8 replies

Hi, I'd like an explanation of the PSD of a sequence of independent random PAM symbols or amplitude +1 or -1. Now any standard textbook tells...

Hi, I'd like an explanation of the PSD of a sequence of independent random PAM symbols or amplitude +1 or -1. Now any standard textbook tells us that the PSD is the Fourier Transform of the autocorrelation of the signal, in my case the symbols are INDEPENDENT and => the autocorrelation is non-zero only over the symbol duration 'T', beyond this it goes to zero. Going through the maths I come ou


Does anyone know where to find the detail about SRS TruDialogue?

Started by fl in comp.dsp4 days ago 1 reply

Hi, SRS TruDialogue technology is widely used in consumer audio product. I want to know its detail, but cannot find any document on-line. It...

Hi, SRS TruDialogue technology is widely used in consumer audio product. I want to know its detail, but cannot find any document on-line. It has been patented for some years. Could you tell me where I can find its principle description? Thanks,


FEC for Burst FSK

Started by mite_learner in comp.dsp6 days ago 15 replies

Hi all, I started working on FEC for burst FSK system over multipath channel. I want to ask the community here about what type of FEC would be...

Hi all, I started working on FEC for burst FSK system over multipath channel. I want to ask the community here about what type of FEC would be best for such system. Which type of FEC is being used in existing FSK systems? Any pointers to literature and implementation work would be welcomed. -- Sam --------------------------------------- Posted through http://www.DSPRelated.com


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