DSP

fftw in C++
Hi, Sorry if this is not the right forum but, I didn't know who else to turn to. I have a quite simple process. I use FFTW library to take a forward fft of a one dimensional signal and then do some multiplication in freq. domain and then a backward (inverse) fft. (called in a C++ code). I check the result wit... 29 Mar 2010 13:35

what is the typical program memory space designers encounter?
Hi, c6713 has 264 kilo bytes of internal ram. and 256 kilo bytes of on-board flash. we are working on speech recognition project and worry if this much amount of program memory is sufficient or would it cause problems when we go for production? Anyone else has faced any problems on program memory size... 30 Mar 2010 20:39

Complex FIR coefficients
What is the physical significance of having an impulse response with complex coefficients ie {h0,h1,h2...hn} where the h values are complex. Hardy ... 11 Apr 2010 07:56

Help
I am seeking someone who would be willing to do contract work developing a simple 4th order butterworth filter application. This low frequency application simply needs to read in digital accelerometer 16 bit data via spi, filter, and send the data out to a PC. Like to use a PIC DSP. Need done asap. ... 28 Mar 2010 08:57

Idiots, we all will be killed in a couple of days. Write to Genevaand plead the citizens of Geneva to block the entrances to LHC.
On Sun, 28 Mar 2010 04:45:47 -0400, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: ehsjr wrote: krw(a)att.bizzzzzzzzzzzz wrote: On Sat, 27 Mar 2010 02:15:32 -0400, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: "krw(a)att.bizzzzzzzzzzzz" wrote: ... 28 Mar 2010 06:47

Lookup Table Vs. FIR For Modulator Pulse Shaping
Hi People, I'm trying to think of an efficient way to implement a Shaped OQPSK modulator in hardware (FPGA or CPLD). My first thought was to use an FIR filter. However, since there are only two input bits per symbol, there are only a relatively small number of output states and (it seems) a LUT could be much mor... 4 Apr 2010 02:50

BlackFin meminit problem
Hello All, I've run into a weird problem with VDSP 5.0 SP7 tools for BlackFin. Once the size of the code + data is about 200k, the meminit tool refuses to put the meminit stream into the ROM memory section, complaining that there is no space. If I cut the same ROM into two sections, and assign one of them ... 27 Mar 2010 19:56

Idiots, we all will be killed in a couple of days. Write to Geneva and plead the citizens of Geneva to block the entrances to LHC.
On Thu, 25 Mar 2010 14:56:10 -0700 (PDT), Darwin123 <drosen0000(a)yahoo.com> wrote: On Mar 25, 12:42�pm, Magnetic <magnetic.t...(a)yandex.ua> wrote: Idiots, we all will be killed in a couple of days. All! Do you understand this? The world ended 16 March 2010, just as you predicted. Your body has been... 27 Mar 2010 17:38

Demo, CTFT to DTFT, sampling
Hello; I wrote this basic demo to help me learn about DSP for a class (digital filtering) at my school that I am taking now, which illustrates sampling a signal, then it generates the CTFT (cont. time Fourier transform) and then the DTFT (discrete time Fourier transform) from the samples. Both the magnitude ... 27 Mar 2010 10:49

CIC filter bit pruning
Hi, My understanding is that there are two valid ways to specify fixed-point wordlength in a CIC decimating filter: 1) Use the maximum width everywhere and let overflow happen...this yield an EXACT result. Bmax = (N*log2(M*R) + Bin) 2) IF we are not going to use every output bits, we can get rid of some bits alo... 26 Mar 2010 13:08