So, I'm toying with Shannon's capacity theorem, trying to graph out the "sphere hardening" effect that he cites as the basis of the...

So, I'm toying with Shannon's capacity theorem, trying to graph out the "sphere hardening" effect that he cites as the basis of the principle. I can see, intuitively, how the whole notion that the volume of a sphere is concentrated in a thin shell works, but when I try to calculate actual numbers I start running into numerical difficulties at dimensions of around 150 or 200. Even wit...

Gentle comp.dsp People, I've been involved on several projects over the past few years that utilize flash memory in microSD form, and several...

Gentle comp.dsp People, I've been involved on several projects over the past few years that utilize flash memory in microSD form, and several times they have inquired about problems with lifetime of such cards. My employer recently tasked me with investigating the alleged write lifetime issue. Frankly I was appalled at the numerous, significant issues I found in current-day cards. Doe...

Having a hard time figuring out how to properly do soft decoding with vitdec for bpsk. I tried using 'unquant' but my results are the same as hard...

Having a hard time figuring out how to properly do soft decoding with vitdec for bpsk. I tried using 'unquant' but my results are the same as hard decision decoding. trellis = poly2trellis(4,[11 15]); for i = 1:7 for q = 1:n_block %create coded message code = convenc(msg(:,q),trellis); %convert to bpsk code_bpsk = 2*code-1; %add noise tx = code_bpsk' + sqrt(No(i)/2)*...

I am working on a project and looking to license a commercial-grade software AEC. How much should I expect to pay to license a SW AEC and how much...

I am working on a project and looking to license a commercial-grade software AEC. How much should I expect to pay to license a SW AEC and how much in royalty per unit. I expect that it will be used in 10000 units the first year. Thanks.

Hi, I would like to create a WOLA channelizer with overlapping passbands, say 25%, but I'm struggling to see how I could do this as my...

Hi, I would like to create a WOLA channelizer with overlapping passbands, say 25%, but I'm struggling to see how I could do this as my math isn't up to it. I can imagine having two channelizers operating on overlapping input samples and then interleaving the output from the channelizers to increase the sample rate but I'm pretty sure this doesn't get me much closer. Anyone been down this r...

Most software seems to focus on Hann, Hamming, and Blackman windowing. From the graphs I've seen, Dolph-Chebychev appears to outperform...

Most software seems to focus on Hann, Hamming, and Blackman windowing. From the graphs I've seen, Dolph-Chebychev appears to outperform them: https://en.wikipedia.org/wiki/Window_function#Dolph.E2.80.93Chebyshev_window Anyone know why it isn't featured in DSP texts to the extent of the other windows above? Are there drawbacks?

One of the universities I attended had a degree in Medical Imaging, which covers X-rays, MRI, ultrasound, PET et cetera. Now there is a seperate...

One of the universities I attended had a degree in Medical Imaging, which covers X-rays, MRI, ultrasound, PET et cetera. Now there is a seperate discipline, which I would guess is called "biomedical signal processing" that covers 1D signals such as heartbeat, brain waves, eye and muscle activity. Do many colleges offer this as a specialist degree?

Hi, I was asked by someone about this question: "What kind of analog circuit has a bad group delay spec?" I only know some analog circuit...

Hi, I was asked by someone about this question: "What kind of analog circuit has a bad group delay spec?" I only know some analog circuit having good group delay spec, not the opposite. Do you know the answer? Thanks,

hi please help me to programmed linear feedback shift register algorithm in java

hi please help me to programmed linear feedback shift register algorithm in java

I am working with Java and Eclipse to generate Gold Codes. I found about three different codes written in C++ on the internet for generating...

I am working with Java and Eclipse to generate Gold Codes. I found about three different codes written in C++ on the internet for generating the m-sequences. the problem is that I'm new to Java and even though I am translating these codes into Java environment, which is a very irritating process and time-consuming too (four weeks since I started). Unfortunately, non of them is seems to be work...