nospam's articles:

Items(167) /17 Next >> Last >|

Bandpass subsampling? 3 0 (6/19/2013 3:53:44 PM) comp.dsp There is a need to estimate power which falls into given wide (~30% of Nyquist) bandwidth. Power spectrum doesn't matter; just overall number. The power estimate is not needed often; so a decimation facto... Vladimir

AM3358 DSP benchmark 1 0 (6/15/2013 4:19:26 AM) comp.dsp There is necessity to port BlackFin VDSP code to TI AM3358. The later is Cortex A8 core with NEON SIMD coprocessor (???). BlackFin code uses DSP library; namely FFT functions provided with VDSP. The BTD... Vladimir

VDSP is dead 12 19 (2/20/2013 4:33:17 PM) comp.dsp According to the information from ADI website, Visual DSP exists no longer. Crosscore is official successor, albeit not quite compatible. Does this imply near termination of BlackFin and Sharc product lines?... Vladimir

Non-text format for source code 62 24 (1/31/2013 7:20:31 PM) comp.arch.embedded For great many reasons, it would be convenient to have source code in some rich format rather then plain ASC text. I could think of embedding illustrations, links and data into file, custom coloring, indivi... Vladimir

Coherent MFSK 11 20 (11/28/2012 4:34:36 PM) comp.dsp There are communication systems with orthogonal multitone physical layer. That is, one of N frequencies in the set is sent at a time. An example of such system is "Olivia": http://en.wikipedia.org/wiki/Oliv... Vladimir

Video Controller :: Best Practices 5 33 (11/19/2012 3:40:51 PM) comp.arch.embedded I have to design a video subsystem for instrument. Nothing really fancy; just color TFT with menu interface, fonts, bitmaps, graphic primitives, plots and such. The graphics would be entirely CPU based; vid... Vladimir

Compiler bug or my mistake? 9 44 (10/25/2012 5:44:43 PM) comp.arch.embedded IAR AVR ECPP Overloaded function: void foo(u8 x); void foo(s16 x); It appears that foo('A') calls s16 version of function, as if 'A' is int. However foo((u8)'A') calls u8 version of function, as it i... Vladimir

Flag for missed interrupt? 18 41 (10/20/2012 3:39:22 PM) comp.arch.embedded While developing embedded systems, many times I thought it would be useful to have an additional flag for every interrupt. This flag should be set by hardware if interrupt request was set again before the i... Vladimir

Random numbers 46 39 (10/14/2012 2:38:47 AM) comp.dsp Just wonder what methods do you prefer for generation of pseudo random numbers for applications like simulation or dithering. VLV ... Vladimir

Clipped sum of sinusoids 21 36 (10/2/2012 3:26:10 PM) comp.dsp Let's say there is a sine wave signal, and an amplifier with limited output amplitude. To produce maximum output power at fundamental frequency, the sinusoid could be clipped into square wave. So far so goo... Vladimir

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Items(1235) /124 Next >> Last >|

Autocorrelation rocks for Engine RPM 19 3 (6/10/2013 10:12:29 PM) comp.dsp A while ago I posted a question about how to extract pitch information from the messy sound of an engine. It was for an iPhone app I have developed which displays the RPM of an engine based on the sound it ... no-one5677 (26)

Help with IIIR filters 8 5 (5/22/2013 5:04:14 PM) comp.dsp I have a problem understanding IIR filter stability problems. The problem is this; I can't find any stability problems with IIR filters. I have a health problem that prevents me from working, so as a hobby,... FilterDan

Communication System for High speed objects 28 5 (5/29/2013 6:47:27 AM) comp.dsp Hi list, I want to design communication system for high speed objects say 600Km/h. And I plan to use 4FSK or 8-FSK as modulation scheme. Data rate would be around 125Kbps and symbol rate 62.5ksps. What k... mite_learner

CPM #2 27 1 (6/14/2013 9:15:19 PM) comp.dsp Hello, It's my first time here. I have no idea in signal processing math but reasonable C programming, and need to send data (minimum 2400bps though more is better) thru the audio (baseband) section of ... Ro_ny

turbo, convolution codes, rate matching 10 3 (6/2/2013 11:11:50 AM) comp.dsp Sirs, I have few questions on turbo codes ... Followed by turbo coding is the rate matching stage where encoded data are dropped. Now, since decoder operates like machine, will dropping of data not break ... manishp

Video mixing solution for H.264 streams 1 3 (5/22/2013 11:30:00 AM) comp.dsp Hello i need to develop a video mixing solution for h.264 streams.I need a pointer about how to go about it.Is there any Third party toolbox in MATLAB which can take me directly into video codecs intern... sandy80

Derivative of signal 23 3 (6/6/2013 7:11:53 AM) comp.dsp Hello, could somebody give me an advice? At the moment I am solving interesting problem. I have been using SW PLL with SOGI circuit to obtain grid frequency since April and I have to say I am very happy, i... Mimar

PSD, CPSD and Coherence for pulse-like signals 13 3 (5/25/2013 4:43:10 PM) comp.dsp Hi everybody! This is my first post in this community, and while I'm pretty happy to have joined it, I feel rather dejected by the apparent ease of the questions I'm about to ask you. I'm working on a c... pater

Adaptive equalization and synchronization 30 3 (5/30/2013 4:58:18 PM) comp.dsp How does one maintain synchronization when one is using adaptive equalization? I'm currently working on a highly dispersive, varying channel, that needs adaptive equalization to work well. But I've co... tim177 (4427)

filtering and frequency separation 24 3 (6/2/2013 11:04:01 AM) comp.dsp Sirs, I have a question on the filtering. Basically, assume a signal contains two signals that are of different frequencies. In this case, what are the requirements from filtering perspective in order to r... manishp