Timeline for Setting Parity Check Matrix for LDPC channel coding
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| Jul 18, 2020 at 9:45 | vote | accept | Fatima_Ali | ||
| Jul 18, 2020 at 8:44 | answer | added | AlexTP | timeline score: 4 | |
| Jul 18, 2020 at 6:21 | comment | added | Fatima_Ali | @AlexTP I don't mean it should be random matrix, I'm just wondering. I mean what should it be the input 'ParityCheckMatrix' ? Do you have any example for that with size, for example, 1024x2048 or for any other size. | |
| Jul 17, 2020 at 16:12 | comment | added | AlexTP |
@Fatima_Ali I don't get it, why do you want random matrix? Do you have your PCM? If yes, put it to the field like specifying in the website page. In the same page, there is an example and default configuration for the DVB-S.2 standard. Check also function dvbs2ldpc() if you have doubt about the input format.
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| Jul 17, 2020 at 15:56 | comment | added | Fatima_Ali | @AlexTP Yes I checked that, but how can I specify the ParityCheckMatrix matrix ? Is it a random matrix including 0s and 1s with any size I want ? | |
| Jul 17, 2020 at 15:55 | comment | added | Fatima_Ali | @MarcusMüller I see the see from the resultant variable, I can see its size, or I encode a message of that size and it works well, so I can know the size by that way. | |
| Jul 17, 2020 at 15:47 | comment | added | AlexTP |
@Fatima_Ali the documentation is clear fr.mathworks.com/help/comm/ref/… Specify 'ParityCheckMatrix' in both encoder and decoder.
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| Jul 17, 2020 at 15:44 | comment | added | Marcus Müller | These two lines do not print a size. How do you know the size of the code? What is it that you do to know the size? You're not including that in your quesiton. | |
| Jul 17, 2020 at 15:25 | comment | added | Fatima_Ali | @MarcusMüller , I already did clear, I'm sure that gives that output, and that gives that size output. I am using matlab 2019b and I think that should be similar in all new versions of MATLAB. | |
| Jul 17, 2020 at 14:47 | comment | added | Marcus Müller |
@Fatima_Ali these two lines don't output the size, so that can't be all you've done. Do a clear, then post all lines that you had to type to find out the size.
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| Jul 17, 2020 at 14:42 | comment | added | Fatima_Ali | That's all what I entered, I only entered these two commands, and the resulted size is 32400 x 64800. @MarcusMüller | |
| Jul 17, 2020 at 14:40 | review | Close votes | |||
| Jul 20, 2020 at 12:05 | |||||
| Jul 17, 2020 at 14:20 | comment | added | Marcus Müller | Matlab doesn't have a default 32400 x 64800 size: you've entered that somewhere before. You're not showing us all of your code! | |
| Jul 17, 2020 at 12:53 | comment | added | Zeyad_Zeyad | Maybe, you should try to build the ldpc manually using your own parameters. | |
| Jul 17, 2020 at 12:14 | history | asked | Fatima_Ali | CC BY-SA 4.0 |