repetition code

In telecommunications, channel encoding adds redundancy to a transmitted signal to correct errors caused by noise during transmission. A simple example is a repetition code, where each data bit is sent multiple times. For instance, a repetition code of block-length three sends each bit three times. The receiver then uses a majority vote to determine the original bit, correcting errors if at least two of the three bits are received correctly. While this method enhances error correction, it requires more bandwidth, reducing the number of signals that can be conveyed compared to an uncoded system.12