RE: [ecc] Reed-Solomon (15,11)

[mostafa_fawzy@yahoo.com]

HI,
the system works good for 1 error, while for two errors it sometimes 
works and sometimes don't.
for zero code: if the received data was (0000)(1001)(1001)(0...'s) then 
the location of errors is 
[ (1010) -->alpha(9) ]instead of [ (1101)-->alpha(13) ] and
[ (1100) -->alpha(6) ]instead of [ (1111)-->alpha(12) ].
for zero sent code ;if the errors were anywhere else it will be corrected 
right.
for non zero code; two sucessive errors is not corrected.

i think that the problem is in the error locator polynomial.

i have captures some pictures these problems but i don't know how to 
send files on opencores.

I HOPE YOU CAN HELP ME. 
THANKS ALOT. 

----- Original Message ----- 
From: "AJ Sahagun" <aj@a... > 
To: <ecc@o... > 
Date: Tue, 6 May 2003 09:05:32 +0800 
Subject: RE: [ecc] Reed-Solomon (15,11) 

> 
> 
> 
> Hi, I think I've encountered this before, but I need to know 
> whether you're 
> encountering the same problem I had in the past. Can you give us 
> exact 
> details on when your system does not work (something like, "it does 
> not work 
> if I simulate X number of errors", etc.)? 
> 
> 
> -----Original Message----- 
> From: owner-ecc@o...  [mailto:owner-ecc@o... ]On 
> Behalf 
> Of mostafa_fawzy@y...  
> Sent: Tuesday, May 06, 2003 9:33 AM 
> To: ecc@o...  
> Subject: [ecc] Reed-Solomon (15,11) 
> 
> 
> HI, 
> 
> (I still consider my self as a beginner) 
> 
> i finished implementing Reed_Solomon (15,11) using VHDL on FPGA 
> technology. 
> but it is not ALWAYS working right. 
> it corrects some data and don't correct others. 
> i think that the problem is in the error locator polynomial. 
> i didn't know how to implement it so i solved it analytically and 
> got all 
> its 
> casses then i just used some conditions in order to use the 
> suitable 
> polynomial for each special case. 
> 
> 
> i'm seeking for ideas about how to implement this polynomial, 
> i'll be grateful for any other help or any other general 
> information about 
> anything. 
> THANKS ALOT. 
> 
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