1. If there are no bit errors, the input to the FEC decoder is identical to the original codeword, and the decoder produces the original data block as output.2. For certain error patterns, it is possible for the decoder to detect and correct those errors. Thus, even though the incoming data block differs from the transmitted codeword, the FEC decoder is able to map this block into the original data block.3. For certain error patterns, the decoder can detect but not correct the errors. In this case, the decode simply reports an uncorrectable error.4. For certain, typically rare, error patterns, the decoder does not detect that any errors have occurred and maps the incoming n-bit data block into a k-bit block that differs from the original k-bit block.
đang được dịch, vui lòng đợi..