CODED MODULATION WITH INTERLEAVING OF THE I AND Q PATHWAYS AND OPTIMIZED ROTATION

摘要

The invention relates to a method of transmitting a signal representative of a source signal, intended to be transmitted via a transmission channel, comprising the following steps: application of a rotation to said modulation constellation, delivering a mapping of the projection of the rotated constellation, termed the projected mapping, said rotation being implemented according to an angle whose value is defined according to the following two phases: a first phase of determining at least one range of angle values, in such a way that said mapping projected onto each component I and Q is close to a Gray mapping; - a second phase of selecting at least one value from said range or ranges; application of an interleaving of one of said components I or Q with respect to the other.