Correlated spreading sequences for high rate non-coherent communication systems

摘要

The invention relates notably to a method for modulating information symbols to be transmitted in a CDMA communication network by using a non-orthogonal modulation code comprising M spreading sequences (s_m 1≦m≦M), each comprising in N chips (s_m,n 1≦n≦N), the M spreading sequences having the same energy.;According to the invention, the amplitude of the chips take a plurality of values the number M of spreading sequences is higher than the number of chips N per spreading sequence.