Millerkodning

Millerkodning is a method for encoding numerical data into a sequence of pulses. It is a line code, meaning it is used to represent digital signals in a transmission medium. Developed by Donald Miller, this coding scheme aims to provide reliable data transmission by incorporating features that facilitate clock recovery and minimize signal distortion.

The fundamental principle of Millerkodning involves a transition in the middle of each bit period. The presence or absence of an additional transition at the beginning of the bit period determines the value of the bit. Specifically, a transition at the beginning of a bit period signifies a logical '1', while no transition at the beginning indicates a logical '0'. The transition in the middle of the bit period always occurs, serving as a synchronization point for the receiver.

This coding method offers several advantages. The guaranteed mid-bit transition aids in clock recovery, allowing the receiving device to maintain synchronization with the sender, even in the presence of noise or slight variations in transmission speed. Millerkodning also helps to reduce the DC component of the signal, which can be beneficial for transmission over channels that are sensitive to DC bias. However, it is important to note that Millerkodning can lead to longer runs of the same signal level compared to some other line codes, which might necessitate careful design of the transmission channel. It is often used in specific applications where its balance of simplicity and performance is advantageous.