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  1. M

    deep space comm. question

    hi I want to ask a small question , what is the input BER in case of deep space comm. ? Note that I am not asking about the output required BER ( 10^-5 or 10^-6) , I want to know the real range of input BER in practical life. waiting for any answers or hints. regards
  2. M

    ML decoders - are the optimal ones?

    ML decoders hi is the optimal decoding for any coding technique is the ML decoding? which in turn means that the more I approach to the ML decoder output, the more I am to the best possible BER?? waiting for your appreciated replies
  3. M

    cyclic code generating polynomial

    hi How to find the generating polynomail of higher length cyclic codes? for example (89,45) , it takes a very long time on matlab. Have you any other ideas???
  4. M

    synthesis time estimation

    hi all How to estimate the time required for xilinx synthesis tool to synthesis a certain file ? what are the general guide lines to find the approximate time? waiting for any information
  5. M

    binary matrix inversion

    Hi all How to find the inverse of a binary Matrix A , Note that the summation is replaced by xor operation. searching for another matrix B such that A*B=I ( with xor instead of summation) is not efficient, is there another solutions ??? Any ideas?
  6. M

    performance of conv. encoder

    Hi all we know that each conv. encoder has a certain D_free which determines the number of errors that it can correct. But what about the performance of the convolution against more errors? For example ,lets say that we have a conv. that can correct up to 4 bits , what will be its...
  7. M

    your suggestion for a master degree

    hot master degrees Hi all I hope to hear from you your suggestions about a Master degree topics in digital communication. what is hot now? Do you encourage working on LDPC and turbo codes?what is hot in coding now? hope to hear from all of you sson
  8. M

    [SOLVED] FFT core - Xilinx ise - This file cannot be synthesized

    FFT core - Xilinx ise Hi all after generating the FFT core in xilinx ise , I found that comment on top of the file: " This file cannot be synthesized and should only be used with supported simulation tools." what does that means??
  9. M

    HDL simulation libraries compilation

    hi all A small question , when and why do I have to compile the HDL simulation libraries??? many codes works nice without such compilation. thanx in advance
  10. M

    HDL simulation libraries compilation

    hi all A small question , when and why do I have to compile the HDL simulation libraries??? many codes works nice without such compilation. thanx in advance
  11. M

    HDL simulation libraries compilation

    hi all A small question , when and why do I have to compile the HDL simulation libraries??? many codes works nice without such compilation. thanx in advance
  12. M

    RF for FPGA- request for resources

    RF for FPGA Hi all I am implementing wimax physical layer ( not all blocks) on spartan 3A kit, I want to send data through RF module and receive it on another kit. I don't know about RF modules and their abilities, if you have any information about this please write it down. if you know RF...
  13. M

    FPGA , RF modules communication system

    FPGA , RF modules I want to make a "mini" communication system on fpga and transmit by rf. is there an FPGA with RF modules?? ,what prices? availabilty? if not , then what to use?? could I use a wireless usb IC as transmitter and receiver?? or will it be difficult and need a lot of work...
  14. M

    Question about reed solomon block in WiMAX

    Hi All I have a small question concerning reed solomon block in wimax. the reed solomon block is assumed to correct bytes-or burst errors- while viterbi is assumed to correct single bits. but the reed solomn block is followed by interleaver ( after convolutional coder) which will distribute...
  15. M

    FFT delay time in VHDL

    fft core vhdl greece hi every body A small question I am using the fft core provided by ISE 10.1 , my options for the FFT core makes the delay about 800 clk cycle. is that core optimized for speed or area?? in other words, if I must use a faster FFT block , could I design a much faster...
  16. M

    simulink model to DSP

    viterbi in simulink Dear all Please reply if you have any related information to any question I have a wimax simulink model file . if using reed solomon decoder , the model can easily be downloaded on DSP with no problems. But if we used convolutional encoder and corresponding viterbi...
  17. M

    interfacing AVR and mobiles

    avr323 interfacing gsm modems I want to interface avr and a mobile phone how to do that?? details please can this be done for any mobile?? what is the restrictions?? which mobiles suport this??
  18. M

    human speech frequency

    frequency range of human speech hi every body What is the frequency range of human speech?? and that of music???
  19. M

    sound processing in Matlab

    Hi I have a song which I want to seperate the songer's sound from the music ( I want to delete the music) How can I do that by matlab ?????
  20. M

    Two Wire Interface for Atmega 8535 ?

    avr twi assembly hi every one has any tried twi for atmega8535 ?? is there any working code?? i cant simulate my code( i am using avr studio) is there a mistake?? thanx in advance

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