Patent ID: 6178535
Filing Date: 2001-01-23
Classification: H03M,H04L

Abstract:
A method for decreasing frame error rate of information to be transmitted in the form of data frames in a data transmission system, in whichthe information to be transmitted is divided into data frames (102, 202),the data frame (102, 202) is supplemented with error detection data generated by using part of the information to be transferred,at least part of the information to be used in the generation of error detection data is protected by error correction coding (107, 206), by which an error correction coded data frame (111, 212) is obtained, in which at least some parts have different error rates (BER), andthe error correction coded data frames (111, 212) are transferred in the data transmission channel from the transmitter to the receiver,wherein the error rates of at least one part of the protected information is levelled out by shaping at the transmission stage at least part of that information part (207) which is protected by error correction coding and which is used in the generation of the error detection data.