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Recent content by bizoo

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    What is an adder based clock

    So what is an adder based clock in FPGA's or modern embedded system hardware.??I tried googling it but it gives more hints about where it is used than how and why it is different from normal clock implementations in hardware ( a counter driven by an oscillator) thanks in advance! cheers
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    Interrupt line of the PCI bus from the bus

    Hi! thanks again for the insightful reply. i just took the measurements and indeed active low and levels are 0 and 5 volts. So somewhere on the motherboard is a PU resistor. Also i looked into the PCI standard and found out that the interrupt line is open drain. So the whole issue boils down...
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    Interrupt line of the PCI bus from the bus

    HI! Thanks for the reply! but here is another thing what i was thinking (could be wrong here though so pardon my ignorance) One end of my wire is connected to the PCI INTR pin on the PCI slot. the second end is being fed into the FPGA board. Now what i do not know is where is the PU resistor...
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    Interrupt line of the PCI bus from the bus

    Feeding the Interrupt line of the PCI bus from the motherboard to another device HI all, I am basically a software engineer who had a small circuit design issue and need some guidance. I need to take the interrupt line of the PCI card from my motherboard and feed into a small FPGA which has a...
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    generating 1 pulse per second from serial port

    send pulse serial port HI I am workin in Linux and want to generate 1 pulse per second from my serial port. i am in need of pointers for that. cheers!
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    ideas for deomonstration for a technical project

    technical project ideas Hi all, A bit of background first. We, at our work place, annually hold a night for science. What we do is that all the guys at the office work together to produce demos out of their current research work and present them to general public in a fancy yet informative...
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    controlling individual speakers of PC

    I am currently working on the feasibility of the following idea so any help would be appreciated Its just a small project in which the goal is to control the sound emanating from the inbdividual speakers, i have two speakers attached with my PC. WHat i want from them is that to control the...
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    How to simulate JTC channel models?

    HI all i am trying to simulate my communication system models and i have been planning to use JTC channel models A,B and C for indoor environments. BUt i dont know how to simulate these channels, i have tried to search the web for this JTC models but to no avail. Any one with any idea about...
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    SNR for spread spectrum systems

    spread spectrum snr HI folks i am trying to relate SNR (C/N) with Es/No while browsing on the web, i came across this formula for spread spectrum SNR= Es/No + (1/spread_rate) [db] + (1/sampling_time) [db] Now any one knows how this formula has been dervived. I am particularly interested...
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    coherent and noncoherent ..

    difference between coherent and noncoherent i have a read a few times that if Your data is differentially encoded than You dont need to know the phase. You only need to know the incoming frequency and the PLL is there do that for You. Now i dont understand how i can avoid phase detection with...
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    What is an integrate and dump filter?

    integrating and dumping circuit hi thanks for replying actually i have a spreaded signal, which i despread through PN sequence through correlation, as a result i have a few corelation values and one of the values is the peak correlation, the next thing basically is to decided on which bit...
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    What is an integrate and dump filter?

    HI all can some one tell me what is basically an integrate and dump filter and whats the functionality of such a filter/circuit br
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    How does the unwrap function in Matlab work ?

    HI i am using matlab for demodulation of dqpsk signals, my approach gave a bit of faulty answers, but whe i used a built in function in matlab, the answer came out right upon a bit of search, i find out that matlab is using unwrap function, i looked at its help but it looks and sounds...
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    Help me fix a problem in CCK demodulation by 802.11 standard

    Hi fellas, I am doing CCK demodulation by 802.11 standard. I have a signal which is a real WLAN packet but i am doing the decoding off line. I know where the CCK modulation starts in a WLAN packet so i starts decoding from that very instant. My operation steps are listed below: 1. I downsample...
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    about 802.11b CCK 5.5Mbps

    well its an old thread but i am also interested to know how dibits d0 and d1 rotate the whole vector, i know that the phase of d0 and d1 is present in every chip of the codeword of CCK, but what does it mean that the presence of this phase rotate the whole vector/ br

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