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# Matlab Viterbi Decoding

18 Threads found on edaboard.com: Matlab Viterbi Decoding

## Convolution Coding and Viterbi Decoding with Matlab: High BER with code rate of 5 / 8

Hey, I am building a model for a transceiver and I am struggling atm with the convolution coding and especially its decoding ! I want to use the following code rates: 1/3; 1/2; 5/8; 3/4; For the first two I use different trellis operators (still standard ones) and since I don't use any noise the BER is obviously 0. For the 3rd and 4th rat

## 802.11 a/g/p test signal

Greetings engi's! I'm currently working on my masters (802.11 wlan receiver with matlab/USRPN210). After creating all the important stuff ie: -symbol finder -time synchronization -coarse and fine frequency compensation -symbol demodulator -deinterleaver -viterbi decoder -descrambler layer decoding i'm looking for any test

## Help on Viterbi decoding implementation in DSP

Hi, I once simulated viterbi decoder (I programmed the code, not matlab function or block) with matlab without any problem. Now I implement viterbi decoder in TI DSP with fixed point short date type. I have puzzled with the integer wrapped problem. I think I have some incorrect understanding on the implementation. TI has a (...)

## Hard and soft decision viterbi decoding

can anyone please explain me how to compare the hard and soft decision viterbi decoding for the same input in matlab( in the same program). How to get the best result after comparison in matlab. Thanks in advance.

## 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

## How to mention initialize state in "vitdec" of MATLAB?

Hi all I want to know how one can initialize a particular state (not necessarily zero state) for "vitdec" built-in command of matlab? I want to use this functionality for Tail-Biting viterbi decoding in which decoder saves state while trellis construction as well as traceback. Anyone who could help, would be appreciable. To reply me (...)

Can anyone tell me the viterbi decoding matlab code given the channel coefficients = 1+ 2 z^-1 ? 1.5z^-2 and 876 received symbols.

I want carry out 'a signal processing chain' on simulink (huffman code and convolutif coding and their viterbi decoding) encoding source section(huffman) I do it on matlab and after a using block (for work space) I encode with the convolutif code the problem that out is 2 bit more than the entry i need length(out) = length(entry) to (...)

Hi, I am relatively new in matlab, I need some help with matlab coding for soft decision viterbi decoding in Trellis Coded Modulation(TCM). I cant understand how I can implement in coding. How to give the Euclidean distance on trellis, or how can the points be compared in distance..Please help me. Thanks a lot! Best regard.

## MATLAB Code needed - Soft Decision Viterbi decoding in TCM

Hi, I am relatively new in matlab, I need some help with matlab coding for soft decision viterbi decoding in Trellis Coded Modulation(TCM). Ihave read quite an amount on how soft-decision viterbi decoding works, but I cant understand how I can implement in coding. How to give the Euclidean (...)

## Viterbi programming - need general idea on how to program

U can use the inbuilt function "vitdec" for viterbi decoding,, see the help in matlab for furthr information

## Convolutional coding/viterbi decoding in matlab

Hi why you don't use matlab help. type convolutional in search field and then you find the topics. trellis,vitdec,poly2trellis,convenc ... are some of related commands in matlab. using these command is much easier faster and confident be successful VIVA PERSIA

## viterbi and MLSE programming

Hi, Anyone have the C or matlab programming or of viterbi decoding to share ? ? Anyone have the experience of doing the Maximum Likelihood Sequence Estimator ? Hope someone can help here.... :D Soft-Decision viterbi Decod

## Viterbi decoding of 16-QAM

IEEE 802.11a WLAN model: Screenshot:

## I need matlab code for viterbi decoder of 16-QAM modulation

Dear all I need matlab source code for viterbi decoder of 16-QAM modulation. matlab help has viterbi decoding function only for BPSK. How i can use this function to simulate 16-QAM? Best Regards Morteza Mardani

## matlab code for hard versus soft decision decoding?

ur way may be correct but the thing is that i want to implement it in matlab and for that i dont think if i need quantization. the problem i m facing is that my soft viterbi decoder works fine in AWGN channle but when I apply my soft viterbi deocoder in Rayleigh fading channel with white Gaussian noise the BER vs SNR graph is same as if (...)

## convolutional coding in wimax

i need a matlab code for convolutional coding and viterbi decoding ...........can any one help me

## How to do Viterbi decoding in Matlab

its present in simulink model of matlab.