Patent ID: 8693562
Filing Date: 2014-04-08
Classification: H04L

Abstract:
1. A method for receiving a composite signal transmitted via a nonlinear data transmission channel according to a modulation pattern using a given constellation having a first signal UL and a second signal LL, the method comprising: demodulating and decoding said first signal UL by using a first demodulation and decoding chain in order to regenerate first information of said first signal UL; from said first regenerated information, recoding a set of symbols of complex number form z=x+jy representative of said constellation used for transmission and, shaping to rebuild a continuous time waveform of said symbols; applying a self-adaptive nonlinearity function, which models a nonlinearity introduced into said composite signal by said transmission channel, to said continuous time waveform; subtracting a result of said nonlinearity function from said composite signal to generate a result E; and demodulating and decoding said result E by using a second demodulation and decoding chain in order to regenerate second information of said second signal LL, wherein said self-adaptive nonlinearity function uses an adaptive process based on a calculation which minimizes a correlation between said result E and said continuous time waveform, wherein said correlation is calculated according to said result E multiplied by z*, wherein z* is a conjugated complex number of said z.