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Recent content by badash_123

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    Communication with smart cards

    Hi Vinoth Thanks a lot for the reply and the link. It is really helpful. I am using a sim card type card. I have a question regarding the Maxim product. Do I need to have that definitely for communication or can I just write similar programs for APDU, response and program them onto the card...
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    Communication with smart cards

    Hi I want to communicate with a contact smart card by sending and receiving data. Can somebody please explain what I would need to do to first establish a connection? I have a programmer for the smart card and AVR studio. What else will I require and How do I go about sending APDU, get...
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    Programming ATmega 163 smartcard

    Hi I have an empty fun card Atmega 163 which I am trying to program. I want to use it for some sample program eg Hello world or serial inout output a value.I can write the program in C or assembly using AVR studio. I am using Cas Interface studio to write the program on the smartcard. This...
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    Alignment of signals in matlab based on peaks

    Hi I have a set of traces. Each trace has a certain maximum peak but I find that these traces are shifted a little (based on the location of peak). I want to remove this shift and make the traces have their peaks at the same x axis location. I want to do this in Matlab. I have the max peak...
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    Not getting the same signal after FFT and IFFT in Matlab

    Thanks JoannesPaulus. It seems to be doing what I wanted.
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    Not getting the same signal after FFT and IFFT in Matlab

    I think I get what you are saying. I will try this and get back to you again tomorrow. Thanks.
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    Not getting the same signal after FFT and IFFT in Matlab

    Thanks. I am using 1Ghz samples per period. I used semilogy plot with freq and power of the signal and I think I am seeing components from 0 to 500 Mhz with this. Now I want to use only 0 to around 150 Mhz of this waveform. As I said earlier I used fdatool to get the specfications of the filter...
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    Doubt in Matlab bandpass filtering

    Will filter(b,1,waveform) work if b is the co efficients found using fdatool and waveform is my input waveform ?Please reply. Thanks
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    Power trace measurement

    Ok. Thank you.
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    Not getting the same signal after FFT and IFFT in Matlab

    Ok. I have a waveform obtained from an FPGA performing an encryption algorithm. I need to find out some info (secret key) of the algorithm by analyzing the waveform that I get. The waveform is in time domain. I do not know anything from time domain. So I intend to change it to frequency...
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    Not getting the same signal after FFT and IFFT in Matlab

    Thank you. The waveform2 is in time domain and I need some information about the waveform2 like contributing factors at certain frequencies. Once obtaining the info, i would need to allow only certain frequencies. I think I can do that using band pass filters. But How do I get to know about...
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    Not getting the same signal after FFT and IFFT in Matlab

    Hi I have a signal that I perform FFT on. When I perform IFFT on the FFTed signal I dont get back the old signal. Where am I wrong? My signal is waveform2. I used FFT and IFFT as: fftvalue= abs(fft(waveform2)); ifftvalue=real(ifft(fftvalue)); Ifftvalue and waveform2 are not same. Is it...
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    Doubt in Matlab bandpass filtering

    Thanks for the reply. I am using a ready filter using fdesign.bandpass function.
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    Doubt in Matlab bandpass filtering

    Hi I have a waveform and I need to filter it using a band pass filter to allow frequencies 30 to 70 Mhz. How do I make matlab accept my waveform as its input when doing filtering? I can calculate the co efficients by giving my specifications and I do not know how to give my waveform as an...
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    Power trace measurement

    Thanks for the reply.
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