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Recent content by arash rezaee

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    [AVR] 7 Bit Transfer on SPI

    I have read it more than you think and I also have evaluation board of HMC830 and I god SDI with CLK and I saw the first data to HMC is 7 bit with 7 CLK and then 3 Bytes of data and at the end just one CLK after a while. On the reference you also mention please go to page A-35 figure 24. you...
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    [AVR] 7 Bit Transfer on SPI

    Hi every one I have a chip which is HMC830 and I need to send 7 bit is SPI mode. I am using ATxmega128 and I know I cannot use SPI from ATXmega because it sends 8 bit in each iteration. So how can I write my own software to have 7 bit? Regards, Arash
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    IRLS Algorithm to predict unknown filter

    Hi every one. I search a lot and find out that IRLS algorithm is the best algorithm to find the coefficient of the unknown filter in the design. I want to pre-distort my OFDM signal with IRLS and pass it through RF filter which it`s coefficient are unknown. So after I searched and read a lot, I...
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    RTP Timestamp Problem

    Hi everyone, I confused about timestamp in RTP and don`t know how to use it. I read RFC3550 but I didn`t understand it. Is it possible some one help me and explain it to me by example what is it and how can I use it. I received TS from Ethernet and analyze it and I do`nt know the timestamp in...
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    ASI Over IP standard Problem

    Thanks for reply. you were right but in this standard FEC creation is not explain enough and I need software or some ethernet packet example to figure out how to make this FEC. If you know please let me know.
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    ASI Over IP standard Problem

    Hi Everyone. I read a lot about ASI over IP and i read all the standards such as st2022-1-2007 and st2022-2-2007 for implementing it with FEC. I have problem with FEC part and how to calculate it and insert it in RTP section. Is there any good software or document that explain using RTP + FEC...
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    Cross-Correlation between signal and the delay version

    Ok. just ignore the ofdm generation and just add random matrix and then delay it. again you can see the output of filter is not equal to delay I just added. Please comment OFDM generator and try to add one matrix by your self. Regards Arash
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    Cross-Correlation between signal and the delay version

    Hi here is the code for OFDM Function. By the way the finddelay is matlab function. function y = func_ofdm_generate(qam_mode, ofdm_mode, GI, N_symbol) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %...
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    Cross-Correlation between signal and the delay version

    Hi everyone. I have an OFDM signal and I simulated my feedback signal with delay version of input signal. So now I want to calculate the amount of delay. I know we can do it with matlab function xcorr but I want to do it with FIR filter which the coefficients are the reverse of input signal. I...
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    adaptive non-linear digital predistortion

    Hi every one. I am going to start the project which I can minimize distortion of high power amplifiers. I know one of the technique is LMS algorithm and I started to understand it in system generator. But I have a lots of errors and miss-understanding. I really appreciate you guys if you can...
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    How to implement LMS by System generator

    Hi every one. I tried a lot to figure out how to implement LMS algorithm by system generator but nothing. Can you guys help me and give me some hint or simulink file for implementing LMS by system generator? I search a lot in xilinx website and I didn`t find any example? If you guys know it...
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    video tube lectures for VHDL and FPGA

    Hi every one. I am looking for a good video tube lectures for learning VHDL. Can anyone help me? Regards Arash
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    how to write float to eeprom and read float from eeprom

    That a lot. one more question: Where does it store in eeprom? I mean Does it store it in first page and so on or it is random? I have more valiables which I need to store in eeprom but they are char and I wrote my own code to store them in specific address of eeprom which I address it. So does...
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    how to write float to eeprom and read float from eeprom

    ok, thanks. I will check it and get back to you. - - - Updated - - - you mean in codevision??? But I wrote my own code to write and read from eeprom. Is it really simple? what about If I what to read from eeprom( I mean for floats)? I must mention that I have 10 float number that I need to...
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    how to write float to eeprom and read float from eeprom

    Thanks. I used union and sounds like it works. but I don`t know how to convert 4byte to float using union. Do you know?
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