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Recent content by emma2

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    [SOLVED] Turbo code in Rayleigh fading channel

    I got it! thank you
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    [SOLVED] Turbo code in Rayleigh fading channel

    Thanks alot in the first place, then isn't the division equal to multiplying by the conjugate of h. for my case i will consider h is known at the receiver, and to explain my case: Consider Tx: transmitted signal (coded and BPSK modulated) n:awgn h: channel gain or channel coefficient "I'm...
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    [SOLVED] Turbo code in Rayleigh fading channel

    Hi there, I'm considering flat fading Rayleigh channel. My problem is that , after multiplying the signal by h and adding the AWGN it has this form r=h*tx+n and its obvious that this is a complex values. and to retrieve my data I estimated h at the receiver and divided the received data by it...
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    Matlab Code for MC-CDMA

    Thank you for posting this, it clarified some Rayleigh fading aspects that I was looking for .
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    Joint network channel coding

    have any one done research in network coding , I'm working on applying Joint network channel coding on multiple access relay channel and having a problem with decoding process at the base station , the procedure goes like this: - 2 Mobile stations will send date to the relay station and the...
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    [SOLVED] problem with soft viterbi decoding

    Hi, here is a a matlab code that I wrote for using soft viterb for cc 1/2 , the problem is what I get in BER performance is like the one for hard viterbi ,,please check the code and see if you can help me figuring out the reason
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    [SOLVED] regarding tailing bits in(encoding/decoding)convolutional codes

    Hi, When decoding of a message using vitdec I end up with 3 more bits ,well I know that they are 3 because I have 3 registers ,but how to nicely get rid of these bits OR how to balance them? I tried tailing the input message with 3 0's but I ended up with more 3 bits again. :?:
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    [SOLVED] Encoding Recursive Systematic code

    Do you mean even if I built the trellis using the feedback coeffecient exactly : trellis=poly2trellis(4,[13 15],13); is not enough for the command "convenc" to the rest ifof the job , ?
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    [SOLVED] Encoding Recursive Systematic code

    Oops! I misspell it :oops:, exactly "convenc function" Oh , yes I have that tool box. The book is A practical guide to error control coding using Matlab. Actually he used convenc function in convolutional code but when it comes to turbo code he used the rsc function btw -I already have the rsc...
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    [SOLVED] Encoding Recursive Systematic code

    Hello, In terms of encoding RSC .. Can we use coven function to encode it? I have Matlab book that implemented RSC function to encode it ..and that confused me :?: any:idea:?
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    DEcoding Recursive systematic convolutional code

    Hi, I'm using Costello's book as reference,actually I started with GFs ,then moved to block codes, convolutional codes. And in my system I'm doing something close to distributed turbo code in multiple access relay channel where at the mobile station will do systematic RSC and so at the relay...
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    DEcoding Recursive systematic convolutional code

    Wow ,I didn't expect that someone will give me the time and response this fast,Thanks Kalyanasv. next Ireally want to check the performance so I will go withMaxlog-MAP, but raising MA-BCJR brought to my mind a question ..I thought BCJR is only for turbo code because you need to cosider the three...
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    DEcoding Recursive systematic convolutional code

    Hi,, I have problem figuring out how to do decode recursive systematic convolutional code .. I thought of Maximum log liklehood but I'm not sure about it :roll:. Anyone have an idea that might help. Thanks in advance
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