Rank: 745 based on 145 downloads (last 30 days) and 6 files submitted
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Gabofetswe Malema

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Personal Profile:

Dr. G.A Malema
Lecturer, Departemnt of Computer Science,Univeristy of Botswana.

Professional Interests:
signal processing and processor architectures

 

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Files Posted by Gabofetswe View all
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30 Jul 2009 Flexible Girth 8 QC-LDPC Codes Program constructs girth 8 qc-ldpc codes. Column/row-weights and sub-matrix size are variable. Author: Gabofetswe Malema errorcorrection codes, information theory, ldpc codes 24 0
24 Mar 2009 Flexible construction of girth-six QC-LDPC Codes constructs girth-six QC-LDPC codes given a row-weight,column-weight, sub-matrix size. Author: Gabofetswe Malema communications, information theory, errorcorrecting codes 42 2
10 Jul 2008 Girth-six column-weight three QC-LDPC Codes constructs girth-six column-weight three QC-LDPC codes Author: Gabofetswe Malema qcldpc codes, girth six, coding theory, information theory 18 0
10 Jul 2008 Girth-eight column-weight four QC-LDPC codes constructs girth-eight column-weight four LDPC codes Author: Gabofetswe Malema girtheight, information theory, coding theory, qcldpc codes 16 2
  • 1.5
1.5 | 2 ratings
10 Jul 2008 Girth-twelve column-weight two QC-LDPC codes contructs girth-twelve column-weight two qc-LDPC codes Author: Gabofetswe Malema information technolog..., communications, coding theory, information theory, qcldpc, coding 30 12
  • 2.5
2.5 | 2 ratings
Comments and Ratings by Gabofetswe
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30 Jul 2009 Flexible construction of girth-six QC-LDPC Codes constructs girth-six QC-LDPC codes given a row-weight,column-weight, sub-matrix size. Author: Gabofetswe Malema

I have BER and FER simulations for the (456,4,8) code (i.e m=57). The performance is okay and comparable to other (4,8) codes.
thank you.
Comments and Ratings on Gabofetswe's Files View all
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30 Jul 2009 Flexible construction of girth-six QC-LDPC Codes constructs girth-six QC-LDPC codes given a row-weight,column-weight, sub-matrix size. Author: Gabofetswe Malema Malema, Gabofetswe

I have BER and FER simulations for the (456,4,8) code (i.e m=57). The performance is okay and comparable to other (4,8) codes.
thank you.
20 Apr 2009 Flexible construction of girth-six QC-LDPC Codes constructs girth-six QC-LDPC codes given a row-weight,column-weight, sub-matrix size. Author: Gabofetswe Malema Xiao, Yang

Please check the BER of your codes: when j=4, k=8, m=57, the BER is very poor though it has no girth-4. Why?
10 Mar 2009 Girth-twelve column-weight two QC-LDPC codes contructs girth-twelve column-weight two qc-LDPC codes Author: Gabofetswe Malema ‹Š, ye

Reply to Mr. Wilson Grey
you said
if H(M*N) can be splitted into two parts
{H1}
----
{H2}
H1 has full rank. H2 can be expressed by some rows of H1.
Then one can get G from H1. so C*transpose(H1)=0, C(1*N) is any code word generated by G. Because H2 can be expressed by some rows of H1. So C*transpose(H2)=0.
So any codeword C*H=0
can this algorithm solve the problem which the parity check H is singular
since H1 is nonsingular why not use H1 instead of H
15 Jul 2008 Girth-eight column-weight four QC-LDPC codes constructs girth-eight column-weight four LDPC codes Author: Gabofetswe Malema Xiao, Yang

1. You program can not ensure the obtained H to be nonsingular;
2. If we get the H to be nonsingular from your program, in my test, the minimum weight of the (8,4) codes is good.
3. Your published column weight 2 LDPC codes of girth 12 have many low weight codes, to be useless and mislead readers.
11 Jul 2008 Girth-eight column-weight four QC-LDPC codes constructs girth-eight column-weight four LDPC codes Author: Gabofetswe Malema (us) Schwarz, Urs

after running this script, the user ends up with 55 meaningless variables (total size: 4650720 bytes) in his/her workspace... no what?
us
Top Tags Applied by Gabofetswe
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information theory, coding theory, communications, coding, girth
Files Tagged by Gabofetswe View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
30 Jul 2009 Flexible Girth 8 QC-LDPC Codes Program constructs girth 8 qc-ldpc codes. Column/row-weights and sub-matrix size are variable. Author: Gabofetswe Malema errorcorrection codes, information theory, ldpc codes 24 0
24 Mar 2009 Flexible construction of girth-six QC-LDPC Codes constructs girth-six QC-LDPC codes given a row-weight,column-weight, sub-matrix size. Author: Gabofetswe Malema communications, information theory, errorcorrecting codes 42 2
10 Jul 2008 Girth-six column-weight three QC-LDPC Codes constructs girth-six column-weight three QC-LDPC codes Author: Gabofetswe Malema qcldpc codes, girth six, coding theory, information theory 18 0
10 Jul 2008 Girth-eight column-weight four QC-LDPC codes constructs girth-eight column-weight four LDPC codes Author: Gabofetswe Malema girtheight, information theory, coding theory, qcldpc codes 16 2
  • 1.5
1.5 | 2 ratings
10 Jul 2008 Girth-twelve column-weight two QC-LDPC codes contructs girth-twelve column-weight two qc-LDPC codes Author: Gabofetswe Malema information technolog..., communications, coding theory, information theory, qcldpc, coding 30 12
  • 2.5
2.5 | 2 ratings
 

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