DSP

FFT magnitudes....
Hello Forum, I run the code below for the detection of 2D sinusoids. I am calculating the FFT of Z=1*cos(6*X+10*Y)+ 1*cos(3*X); I get a correct amplitude for the cos(6*X+10*Y) part but the 1*cos(3*X) has a smaller peak (and it shouldn't since it has the same magnitude 1).... Why? I do I get around that simple ... 22 Jun 2010 10:27

Anyone using TMS470 (ARM) toolset?
Hello All, I have to use a TMS470 C/C++ compiler (TMS470 == ARM). The toolset wasn't my choice. The more I use it, the more nonsense I discover and more doubts I have. Also, in theory there is TI DSP BIOS for ARM, but zero documentation. I suspect those tools are kinda unloved by TI, and I am the only one w... 27 Jun 2010 09:32

Inverse of bispectrum?
Hello, I am a newbie in higher-order spectra analysis. Please excuse me if anything appears really incoherent in my question. Some of my initial readings suggest that for a Gaussian signal, its bispectrum is zero. In this connection, suppose I have an additive mixture of Gaussian and Non-Gaussian signals and I... 22 Jun 2010 10:27

Sampling frequency offset correction (resampling) - help needed
hi, Can someone explain how I can compensate for sampling clock frequency offset (SCO) using fractional-delay interpolation? In OFDM basebnad receiver design book they said that you can use fractional-delay interpolation filter to compensate SCO but of course they forgot to write about. Let's say I have a ramp si... 29 Jun 2010 00:54

Suggestion for a fast (and thread-safe) java FFT library
Hallo! I need to calculate FFTs in java on a server in multiple threads - and the FFTs must be fast. As a C-coder I tried the JNI interface to the FFTW3 library [1], which works quite nice - however, unfortunately the plan generation of FFTW is not threadsafe (see e.g. [2],[3],[4]). Therefore my question: can... 21 Jun 2010 11:18

From today's junk mail
from: gpezzella(a)yahoo.com Hello Vladimir I'm Giuseppe, the one that have started the thread about the MW device. I'm sorry to not be able to pay you for consultation. This is not commercial project but a "Final Year Test in my School". This go over what we studied. It is a test for se... 22 Jun 2010 17:08

FFT vs Terez frequency estimation method.
Dear Dmitry Teres, Just few questions: 1) Where can one get your algorithm for evaluation? Intentionally or unintentionally, your patent doesn't make any sense. 2) Is there any objective comparison of performance? 3) Can your claims be supported by a third party technical person, familiar with the art... 23 Jun 2010 12:50

TDM with PCM question
The information in four analog signals is to be multiplexed and transmitted over a telephone channel that has a 400- to 3100-Hz passband. Each of the analog baseband signals is bandlimited to 500 Hz. Design a communication system (block diagram) that will allow the transmission of these four sources over the telephone ... 22 Jun 2010 23:43

Call for Papers: International Conference on Electrical Engineering and Applications ICEEA 2010
Call for Papers: International Conference on Electrical Engineering and Applications ICEEA 2010 CFP: International Conference on Electrical Engineering and Applications ICEEA 2010 Draft Paper Submission Deadline: 2 July, 2010 Camera-Ready Papers Due & Registration Deadline: 30 July, 2010 ICEEA 2010: San Francis... 21 Jun 2010 05:51

multipath simulation with FM modulation
Hi, I want to do some simulation for the FM modulated signal in multipath fading channel. Can you help to check the following matlab scrip is correct or not. Thanks. %m is the modulated signal phase = pi * cumsum(m); SIGNAL = exp(j * (phase)); delaySamples=5; firstPath=SIGNAL; secondPath=SIG... 21 Jun 2010 04:46