Post by sam on Mar 13, 2012 4:37:35 GMT -5
Hello,
First of all, thank you for your article Ms. Haran describing the functionality of turbo code. But I need help on this and here is the description of my problem:
"I tried to implement an ECC type Turbo code for storage systems such as hard disk or memory and I need to understand how to use the Max-Log MAP decoder for digital channels, so we will not use the modulation method and then sends the data on a channel with Gaussian noise or Rayleigh. Indeed, we are interested in implementing a light version of turbo code (Max-Log Map) for the memories and we have some electromagnetic effects and temperature variations which may affect the reliability of memory. in conclusion, we are looking to do this on a binary symmetric channel (BSC) and the equation published in your article describing the turbo code decoder seems not valid in our case.
My question is, how can we change the equations to be suitable for use in a system like BSC? and also, in decoding Max-Log Map, there is always the equations of alpha, beta and LLR but he has no indication about the equation of gamma, and without the gamma value we can not calculate the other parameters, so i ask if there is someone who has a clear description on the equation of the gamma without probability equations? "
Any response is welcome. Thank you.
First of all, thank you for your article Ms. Haran describing the functionality of turbo code. But I need help on this and here is the description of my problem:
"I tried to implement an ECC type Turbo code for storage systems such as hard disk or memory and I need to understand how to use the Max-Log MAP decoder for digital channels, so we will not use the modulation method and then sends the data on a channel with Gaussian noise or Rayleigh. Indeed, we are interested in implementing a light version of turbo code (Max-Log Map) for the memories and we have some electromagnetic effects and temperature variations which may affect the reliability of memory. in conclusion, we are looking to do this on a binary symmetric channel (BSC) and the equation published in your article describing the turbo code decoder seems not valid in our case.
My question is, how can we change the equations to be suitable for use in a system like BSC? and also, in decoding Max-Log Map, there is always the equations of alpha, beta and LLR but he has no indication about the equation of gamma, and without the gamma value we can not calculate the other parameters, so i ask if there is someone who has a clear description on the equation of the gamma without probability equations? "
Any response is welcome. Thank you.