用MATLAB编写HDB3解码的M文件的代码
时间: 2024-12-22 08:11:42 浏览: 13
在MATLAB中,HDB3(高密度二进制编码)是一种用于数据传输的差分线性反馈编码,常用于卫星通信和电话系统。下面是基本的HDB3解码M文件代码示例:
```matlab
function [decoded_data, sync] = hdb3_decode(encoded_data)
% HDB3_DECODE Decodes an HDB3 encoded signal
%
% INPUTS:
% encoded_data - A binary vector representing the HDB3-encoded data
%
% OUTPUTS:
% decoded_data - The decoded binary data
% sync - A logical indicating if a synchronization character was found
sync_char = 'U'; % Synchronization character
sync_period = 7; % Number of bits in one sync symbol (including two '1's and five '0's)
% Initialize variables
decoded_data = zeros(size(encoded_data));
sync_found = false;
% Iterate over the encoded data
for i = 1:length(encoded_data)
% Decode each bit by checking for sync patterns
if encoded_data(i) == 1 && ~sync_found
% If we encounter a '1', check for start of a sync pattern
sync_count = 1;
elseif encoded_data(i) == 0 && sync_count <= sync_period
% Count '0's until we reach the end of the sync pattern
sync_count = sync_count + 1;
elseif sync_count == sync_period && encoded_data(i) == 0
% If all conditions met, it's the end of the sync pattern, so reset
sync_count = 0;
sync_found = true;
else
% If not at a sync, decode the data bit
decoded_data(i) = encoded_data(i);
end
end
% Return decoded data and whether a sync was found
decoded_data = decoded_data(sync_found:end); % Remove leading sync
sync = sync_found;
end
%
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