Click here to Skip to main content
15,908,673 members
Home / Discussions / C / C++ / MFC
   

C / C++ / MFC

 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
leon de boer20-Jun-17 3:34
leon de boer20-Jun-17 3:34 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
Member 1326117520-Jun-17 22:32
Member 1326117520-Jun-17 22:32 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
leon de boer21-Jun-17 2:08
leon de boer21-Jun-17 2:08 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
Member 1326117521-Jun-17 2:16
Member 1326117521-Jun-17 2:16 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
Pete O'Hanlon21-Jun-17 2:27
mvePete O'Hanlon21-Jun-17 2:27 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
leon de boer21-Jun-17 3:11
leon de boer21-Jun-17 3:11 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
Member 1326117521-Jun-17 18:17
Member 1326117521-Jun-17 18:17 
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
Member 1326117522-Jun-17 2:00
Member 1326117522-Jun-17 2:00 
Actually i am not getting about the type of decoder concerned with partially parallel or fully serial bcoz I have to implement the LDPC decoder with the help of belief propagation algorithm.In that process i have been provided with a H matrix,code word like [0 0 1 0 1 1] for a 4*6 matrix.The received word is r=[1 0 1 0 1 1] with a cross over probability of p=0.2.

Now the steps which i have to follow for computation is as follows:-

1.in the first step using logp/1-p i have to find out the received word and it comes like
r=[-1.3863,1.3863,-1.3863,1.3863,-1.3863,1.3863]

2.Since it is a 4*6 matrix
M11=r1=-1.3863 and M31=r1=-1.3863
for i=2,M12=r2=1.3863 and M22=r2=1.3863
.
.
.
.
for i=6 M36=r6=-1.3863 and M46=r6=-1.3863

3.Extrensic information.It is calculated by using formula

E11=log(1+tanh(M12/2)tanh(M14/2)/1-tanh(M12/2)tanh(M14/2))
Like that i have to calculate for eacha nd every node and finally a E matrix has been formed

4.calculation of LLR
L1=r1+E11+E31=some value
.
.
.
.
L6=some value
finally on the basis of BPSK scheme
Z=[0 0 1 0 1 1]

5.To check if Z is a valid codeword
S=Z.H transpose
if it comes like [0 0 0 0] then my code word is correct otherwise have to go for next iteration.

Please tell me how should i proceed.Its a total mathematical calculation.I am stuck with the point of taking matrix as a input.If i take it as an array also then how should i calculate that tanh calculation.
GeneralRe: Need Source Code for Decoding _Using algorithm Pin
leon de boer22-Jun-17 10:31
leon de boer22-Jun-17 10:31 
QuestionLocal / unique Variable Macro question Pin
ForNow18-Jun-17 8:44
ForNow18-Jun-17 8:44 
AnswerRe: Local / unique Variable Macro question Pin
Iain Clarke, Warrior Programmer18-Jun-17 20:36
Iain Clarke, Warrior Programmer18-Jun-17 20:36 
SuggestionRe: Local / unique Variable Macro question Pin
Jochen Arndt18-Jun-17 21:42
professionalJochen Arndt18-Jun-17 21:42 
AnswerRe: Local / unique Variable Macro question Pin
leon de boer19-Jun-17 3:40
leon de boer19-Jun-17 3:40 
GeneralRe: Local / unique Variable Macro question Pin
ForNow19-Jun-17 3:55
ForNow19-Jun-17 3:55 
GeneralRe: Local / unique Variable Macro question Pin
leon de boer19-Jun-17 5:14
leon de boer19-Jun-17 5:14 
GeneralRe: Local / unique Variable Macro question Pin
ForNow19-Jun-17 5:52
ForNow19-Jun-17 5:52 
GeneralRe: Local / unique Variable Macro question Pin
leon de boer19-Jun-17 9:16
leon de boer19-Jun-17 9:16 
AnswerRe: Local / unique Variable Macro question Pin
Bram van Kampen28-Jun-17 13:21
Bram van Kampen28-Jun-17 13:21 
GeneralRe: Local / unique Variable Macro question Pin
ForNow28-Jun-17 13:47
ForNow28-Jun-17 13:47 
GeneralRe: Local / unique Variable Macro question Pin
Bram van Kampen28-Jun-17 14:21
Bram van Kampen28-Jun-17 14:21 
QuestionDisecting a PE File Pin
Bram van Kampen16-Jun-17 14:19
Bram van Kampen16-Jun-17 14:19 
AnswerRe: Disecting a PE File Pin
leon de boer17-Jun-17 3:17
leon de boer17-Jun-17 3:17 
GeneralRe: Disecting a PE File Pin
Bram van Kampen18-Jun-17 12:46
Bram van Kampen18-Jun-17 12:46 
GeneralRe: Disecting a PE File Pin
harold aptroot18-Jun-17 3:11
harold aptroot18-Jun-17 3:11 
GeneralRe: Disecting a PE File Pin
Bram van Kampen18-Jun-17 13:05
Bram van Kampen18-Jun-17 13:05 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.