DSP

SHARC Memory Architecture
Hi Folks, I've been getting acquainted with the SHARC 21369 the last few days and have some questions on its memory architecture: 1. Is the basic idea a sort of crossbar switch in which the three buses, DM, PM, and IOP, are connected with the four parallel memory spaces ("blocks" in ADI's parlance) in as... 7 Jul 2008 11:27

another FFTW problem
Hi, I am using FFTW to try another test, f(t)=exp(-x), x>=0, the real part of the Fourier transforms should be 1/(1+x^2). I use xmax=1000, and xmin=0, let N=8192. I found the results seems shifted upper, every output value is larger than the analytical solution. My code is like this: program test implicit ... 12 Jul 2008 16:38

Multipath Fading
Hello, I'm working on simulation of WiMAX OFDMA uplink with multiple users in fading environment. As per my understanding at antenna of receiver we get interference from multipath component of first symbol (which is delayed and more than Cyclic prefix) with say LOS component of second symbol. In Simulink, th... 7 Jul 2008 11:27

Digital IIR Filters from S-Domain Transfer Functions
I need to design a number of digital IIR filters based upon transfer functions given in the s-domain. The filters are weighting filters (as discribed in British Standard 6841)which will be used to filter some vibration data in Excel in order to assess against a human comfort criteria. I have applied the bilinea... 4 Jul 2008 14:06

white noise generation
Hello, newbie here in need of some help: I'm trying to generate white noise. I found a paper online called "Xorshift RNG's" by George Marsaglia, and found it attractive because of its simplicity, and its also supposed to generate very good random numbers that have long periods, pass the diehard randomness tests,... 6 Jul 2008 09:54

Need Consultant to design TV Decoder
We're looking for a DSP engineer/consultant to develope composite video decoder. The decoder features include: 1. support all-standards:NTSC, PAL and SECAM; 2. support non-standard signals and VCR mode 3. Macrovision copy protection detection and VBI slice 4. Video post-processing If you have experience in design... 3 Jul 2008 18:41

Writing Data to flash memory
Hi all, I have a data acquisition application running on BF534 processor. This application has been loaded on to the flash. I want the data that is acquired by this application to be stored in the flash itself. Any pointers on how to proceed with this? I have tried to use the flash programming driver provided by... 9 Jul 2008 10:36

algorithms for increasing peak-to-average ratio for audio signals
I am looking for an algorithm that dynamically alters the phase relationships between the spectral components of a music or voice signal in an attempt to reduce the peak-to-average ratio. I recall hearing about this in reference to increasing the coverage range of AM transmitters but I am having trouble digging up ... 4 Jul 2008 06:56

Question about an algorithm from
I had been looking for a good DC noise filter and stumbled upon the "DSP Trick: Fixed-Point DC BlockingFilter With Noise-Shaping" entry on dspguru. I have minimal signal processing experience, so I was looking for something I could drop into my application. I needed to filter out, in real-time, the DC offset from a... 2 Jul 2008 22:11

Can you recommend a good explanation of the proof of the Fourier Transform?
Check planetmath and mathworld: http://planetmath.org/encyclopedia/DiscreteFourierTransform.html http://mathworld.wolfram.com/DiscreteFourierTransform.html ... 14 Jul 2008 01:22