DSP

Histogram Filter
Hello all, Can anyone suggest some good article in understanding Histogram filter fundamentals used in CFAR Threshold calculation? Best Regards Derare. ... 22 Mar 2006 20:04

If I want to learn fourier transform..
I am 8 years away from my university education. I was not good in math at school. I've learned some calculus in high school and in the university. However, I was a terrible learner in advanced calculus in university. How do I learn fourier transform? Where can I start? I've searched many on-line tutorials but I... 17 Mar 2006 18:56

Interleaver for channel coding
Hi all... I need a psudorandom(not S-random) interleaver for "serial concantenated code(SCC)"... I found many papers, but they often design for "parallel concantenated code(PCC)", like turbo code. I don't know if i use the psudorandom interleaver designed for PCC in SCC coding, does any bad effect? I would lik... 16 Mar 2006 08:03

eXpressDSP xDAIS xDM
Hello! I am interested in hearing from people who have either developed or used signal processing modules conforming to TI's standard. I have read some of their documents related to this topic. Most of what they preach are good programming practices. The part I find most interesting is their recommendation/re... 17 Mar 2006 09:01

Noncoherent Detection Tutorial Request...
Hi all... I'm studying noncoherent detection for M-PSK or M-QAM. But i can't find detail ,clear and easier tutorial.(I'm a beginer in this area) So, can anyone tell me where i should read first!? B/R chaselweng ... 16 Mar 2006 13:48

FFT in OpenCV
I use the function cvDFT in Visual C++. But i don't find the same Matlab 's result with the function fft2. Why? for the vector [0 0 1], Matlab return [1, -0.5+0.866i, -0.5-0.866i], and with the function cvDFT in OpenCV i have [1, 1, -0.5-0.86i] for the same vector. I don' t understand why. Please help me. ... 13 Mar 2006 09:15

DSP-impulse invariance method
Now, I use the impulse invariance to design a lowpass filter. I need to find the H(s) from pole pairs. I don't know how toconvert H(s) to H(z). Can anyone help me? Thanks!! Laura ... 13 Mar 2006 21:45

were is the error? (QPSK ->8PSK)
The following code from Matlab examples works correctly for QPSK uncoded - it gives BER vs SNR in AWGN channel - both theoretical and empirical, and both do practically coincide. However, when changing M from 4 to 8 (expecting to do the same for 8PSK constellation) - the theoretical plot gets correct, but empirica... 12 Mar 2006 09:57

RAW image data format
I just got a digital SLR, and one of the recording formats is RAW. The resolution isn't noticeably better than its extra fine jpeg, but it ought to be easier to process. I'm pretty happy using GIMP (Gnu Image Manipulation Program, obviously free) on my digital images, but it doesn't know Minolta's RAW format. I... 12 Mar 2006 22:50

How to calculate angle between two vectors
Hello all, I have two vectors (in rectangular coordinates) and I would like to calculate angle between them. Is there any other (faster) way than calculating atan of both and substracting. I can scale vectors so that they can both have the same magnitude Thanks, Mitja ... 8 Mar 2006 08:15