Error correction method used for improving data error correction efficiency under high error rate environment

Abstract

The invention provides an error correction method used for improving the data error correction efficiency under a high error rate environment. The method comprises the steps as follows: S1, a data sending end builds a communication connection with a data receiving end; and the structure of a frame of data in a data physical layer sent by the data sending end is formed into a header, a CRC check code and a data sting; and S2, a data receiving end receives a data frame M from the data sending end; the CRC check code in the data frame M is checked, if the condition that an error code occurs in the data frame M is detected, information is fed back to the data sending end to perform data retransmission, the data receiving end further receives a retransmission frame N from the data sending end;during an actual application process, if the CRC check code passes the check, the combination of data difference parts of the data frame M and the retransmission frame N is correct data, if the CRC check code cannot pass the check, the other retransmission frame N+1 is waited continuously; according to data error correction in such mode, the data error correction efficiency under the high error rate environment can be significantly improved.

Description

[technical field] [0001] The invention relates to the technical field of data error correction methods, in particular to an error correction method for improving data error correction efficiency in a high bit error rate environment with high data transmission rate and outstanding error correction rate. [Background technique] [0002] Wireless transmission technology is widely used in distributed security monitoring, traffic monitoring, industrial monitoring, home monitoring and many other fields. The wireless transmission widely used in the smart home field includes 433, zigbee, Bluetooth, and WIFI. However, in the specific use process, wireless The signal becomes worse with the increase of the transmission distance, and there will be bit errors in the transmission. When the bit error rate is high to a certain extent, the transmission speed will be slow or even impossible to transmit. Error retransmission: When the receiving end detects a data transmission error, it will feed...

AI Technical Summary

Problems solved by technology

[0002] Wireless transmission technology is widely used in distributed security monitoring, traffic monitoring, industrial monitoring, home monitoring and many other fields. The wireless transmission widely used in the smart home field includes 433, zigbee, Bluetooth, and WIFI. However, in the specific use process, wireless The signal becomes worse with the increase of the transmission distance, and there will be bit errors in the transmission. When the bit error rate is high to a certain extent, the transmission speed will be slow or even impossible to transmit. Error retransmission: When the receiving end detects a data transmission error, it will feedback and resend ;Redundant error correction code: By adding redundant error correction codes after transmitting data, the receiving end automatically corrects errors; during operation, error retransmission will consume a lot of time on retransmission, resulting in a decrease in transmission speed. If the bit error rate is higher than a certain value (above 1%), there will be a bit error in each transmission, and the transmission will not be possible. The additional redundant information added in the redundant error correction code will reduce the effective data ratio, reduce the transmission speed, and redundant The remaining error correction capability is limited. If the number of errors exceeds the error correction capability, error correction will not be possible

Images