POLYNOMIALS FOR GUIDED SCRAMBLING LINE CODES

Guided scrambling (GS) is a line coding technique developed specifical ly for high bit rate fiber optic transmission systems, This paper cont inues the development of GS coding by introducing more scrambling poly nomials that can be used with this technique. First, a method is prese nted for constructing polynomials which can be used with balanced enco ding, Then it is shown that these polynomials can be used as bases for large families of polynomials, an expansion whose usefulness is demon strated with the presentation of power spectra for several code config urations, These results indicate that polynomials can be selected from these families to exercise control over average as well as worst-case statistics of the encoded bit stream, a property not available with a ny other single efficient, balanced line coding technique developed to date, Criteria for polynomial selection are given, and polynomials ar e recommended for several GS code configurations.