Communication Technology

Gold Code

Gold Code is named after Robert Gold. It refers to a special set of binary Random (Pseudo Random) sequence in which the correlation among member sequences is very small. Due to this property (small correlation), this is widely used for various wireless communication system as a scrambling code.

We can generate a Gold Code in a very simple method using m-Sequence. If you pick a two m-sequence circuit with the same number of taps and combine the two circuit by XOR, it generate Gold Sequence.

Following is one example of Gold Sequence Generator Circuit.

Common Application of this kind of Gold Code (Gold Sequence) is Scrambling procedure of Cellular Communication Channel Coding. Refer to LTE Physical Layer Sequence : Psuedo Random Sequence (Gold Sequence)