error while using BCHencoder

Question

As_rar 2020-11-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/640855-error-while-using-bchencoder

编辑： Pooja Kumari 2024-1-15

Hello everyone

I would ask about BCHencoder ..

I use BCHencoder from communication toolbox , as in https://www.mathworks.com/help/comm/ref/comm.bchencoder-system-object.html

and this error come to me

Error using comm.BCHEncoder/setParameters
N and K must be positive, double precision integer scalars

all k and n are integers

this is my code

ds=randi([0 1],18,1);                                  %generating a random string
enc = comm.BCHEncoder(20,18);                           %creating Object of BCH encoder (ECC: error corecting code)
c=step(enc,ds);     

the error come from " step(enc,ds)"

i use matlab 2020b

could anyone help me how to fix the error

thank you so much

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Jorge Cadena 2021-9-29

I have the same issue and no idea how to resolve it. Were you able to find a solution?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Pooja Kumari 2024-1-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/640855-error-while-using-bchencoder#answer_1389536

编辑：Pooja Kumari 2024-1-15

在 MATLAB Online 中打开

Hi,

As per my understanding, you are facing "Error using comm.BCHEncoder/setParameters N and K must be positive, double precision integer scalars" error because value of "N" and "K" are not of correct data type or value.

The value of codeword length which is represented by "N" must take the form (2^m – 1), where m is an integer in the range [3, 16]. The message length which is represented by the "K" parameter should follow this condition that "N > K" and both should be integers.

Value of "M" which is given as "20" does not satisfy 2^m-1 property.

Example code for BCHEncoder:

% Define BCH code parameters
n = 15; % Codeword length
k = 5;  % Message length
% Create BCH encoder and decoder objects
bchEncoder = comm.BCHEncoder('CodewordLength', n, 'MessageLength', k);
bchDecoder = comm.BCHDecoder('CodewordLength', n, 'MessageLength', k);
msg = randi([0 1], k, 1); % message signal
encodedMsg = step(bchEncoder, msg); % Encoding message signal
% Introduce errors
receivedMsg = encodedMsg;
errorPositions = [3, 7]; % Example error positions
receivedMsg(errorPositions) = ~receivedMsg(errorPositions); % Flip bits to introduce errors
[decodedMsg, errorStats] = step(bchDecoder, receivedMsg); %decoded message signal
% Find error locations by comparing the original encoded message and the received message
errorLocations = find(encodedMsg ~= receivedMsg);