The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2008
Filed:
Dec. 14, 2001
Enrico Forestieri, Parma, IT;
Giancarlo Prati, Parma, IT;
Enrico Forestieri, Parma, IT;
Giancarlo Prati, Parma, IT;
Marconi Communications S.p.A., Genoa, Cornigliano, IT;
Abstract
A coding scheme of order n for digital communications, in particular optical communication, for obtaining a coded signal x(t) which represents binary data which are constituted by sequences of information bits {u} with rate T, the scheme having N=2states, named Σ, for i=1, 2, . . . , N, and comprising predetermined elementary signals s(t) which are combined in the signal x(t). According to the scheme, if, at the time t=kT, the coding is in a state Σof the N states, the arrival of the information bit uof the sequence {u} forces a transition to the state Σof the N states and the selection of the elementary signal s(t) as x(t), where q and i are given by the following equations: d=m−1 mod 2; d=d+umod 2; y=2(m−1)+d; q=(r mod N)+1; and i=r+1 if r<N, or i=r−2N otherwise.