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MATLAB legends
Hi all, i m stuck in a situation that i would like to share in this board. I have generated a figure in MATLAB having multiple curves. Legends of this curve were shown through the GUI "insert legend" button. Now i want to hide some of the legends while showing the others. Anyone...
convolutional code
Its a convolutional coding program with MPSK modulation and hard-decision decoding. It generates a BER performance graph where the blue curve indicates the uncoded system while the red curve indicates the convolutionally coded system.
Re: convolutional code
Its hard to detect errors in someone's else program but here is a program i have of coonvolutional coding with MPSK modulation that might come in use.
By the way tell me how to chose the values in "poly2trellis([4 3],[4 5 17;7 4 2])" and can u make a conversion of codes...
First of all, u need to decide what technology u will be working on. For audio/video transmission over wireless medium u can use a number of technologies such as (DAB/DVB , OFDM, MC-CDMA, ect...). After that a block diagram can constructed based on the chosen technology.
Let me rephrase the question in a more descriptive form. For a convolutional code of code rate R=2/3, if i have a parity check matrix in octal form such as [11 2 4], how can i convert it into its (k by n) generator matrix form. Plz provide the steps in detail as much possible, with thanks.
error correcting codes in matlab
aliazmat, first of all it depends on MATLAB versoin u use. As newer versions get released, new channel codes support are available. I personally use MATLAB2007 which has a variety of codes support, such as:
- Linear Block codes
- Convolutional codes
- TCM codes...
trellis code modulation+matlab code
Hi, can anyone convert the following codes into a form accepted by poly2trellis function in matlab, they are all of code rates = 2/3
H0 = 11 H1= 02 H2 = 04 (v=3 "constraint length)
H0 = 23 H1= 04 H2 = 16 (v=4)
H0 = 45 H1= 16 H2 = 14...
u need to be more specific on which area of communication u r talking about, for instance coding at Rx gives better BER in the expense of more required bandwidth. and there are many other counter measures in communication systems.
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