Abstract:
The forward error correction function can better improve the bit error performance. Before the signal is transmitted on the channel, it is pre-processed according to a certain format, and redundant code with signal characteristics is added, and it is decoded according to the specified algorithm at the receiving end, and the error detection during transmission is verified by the receiving end. Notify the sender to resend, which allows re-encoding from low-bit-error encoded data to form a series of error-free data streams, so as to achieve the purpose of finding and correcting error codes.
FEC, Forward Error Correction, that is, forward error correction function.
As far as the current development trend of optical transceivers is concerned, it is mainly developing towards high-speed and long-distance. We provide proffessional guidance about the optical transceiver wiki. However, with the increase of transmission rate, the transmission distance of signals will be limited by many factors, such as chromatic dispersion, nonlinear effects, and polarization modes. Dispersion, etc. These factors will limit the simultaneous increase of transmission rate and transmission distance. In addition, there is no ideal digital channel in the actual transmission process. Signals will always produce distortion and non-isochronous delay in the transmission process of various media. It means bit errors and jitter, and FEC codec technology can better improve bit error performance. Before the signal is transmitted on the channel, it is pre-processed according to a certain format, and redundant code with signal characteristics is added, and it is decoded according to the specified algorithm at the receiving end, and the error detection during transmission is verified by the receiving end. Notify the sender to resend, which allows re-encoding from low-bit-error encoded data to form a series of error-free data streams, so as to achieve the purpose of finding and correcting error codes.
FEC is suitable for high-speed communication (25G, 40G, 100G, especially 100G optical transceivers). We even have China 40g qsfq+ for sale. Although the FEC function has the advantages of forward error correction and increased transmission distance, it will inevitably cause some data packets to be lost during the process of correcting errors. Delay, so not all high-speed optical transceivers are recommended to enable this function. For example, when using a 100G LR4 optical transceiver, it is not recommended to enable the FEC function. The 100G optical transceiver mainly relies on configuring the FEC function on the device side to implement error correction, so the switch needs to support the FEC function. Usually, switches that support the FEC function enable the FEC function by default. In addition, it should be noted that if the A-side optical transceiver enables the FEC function, the B-end optical transceiver must also enable this function, otherwise the interface will not be Up. We can provide you reasonable and competitve 400g optical transceiver price.
It can be seen that in the optical transceiver transmission system, the FEC forward error correction function can greatly improve the effectiveness and reliability of communication.
