Patent ID: 7333734
Filing Date: 2008-02-19
Classification: H04L

Abstract:
1. A method of transmitting data, comprising the steps of: encoding said data to obtain a code of order n for transmission from a transmitter to a receiver in a communications system; operating an encoder to obtain a coded signal x(t) which represents binary data which are constituted by sequences of information bits {u k } with rate T, the code having N= 2 n states named Σ i , for i =1, 2, . . . , N for the encoder, and predetermined elementary signals s i (t) which are combined in the coded signal x(t): if, at the time t =kT, the code is in a state Σ m of the N states for the encoder, forcing a transition to the state Σ q of the N states upon arrival of information bit u k of the sequence of information bits {u k }; selecting the elementary signals s i (t) as x(t), where q and i are given by the following equations: wherein the elementary signals s  and g(t) is a pulse of time length D=(n+1)T centered in the origin such that g(t)=g (−t) and having constant values over time intervals of length T/2; wherein the elementary signals s wherein each couple of the signals has a level different for the level of other couples of the signals.