Telefonaktiebolaget LM Ericsson (publ)
First network node and a method therein for generation and transmission of a binary phase shift keying (BPSK) signal

Abstract:

A first network node (NN) and a method therein for generation and transmission of a Binary Phase Shift Keying (BPSK) signal to a second NN. The first and second NNs are operating in a communications network. The first NN generates a third bit stream x(n) from a first bit stream d(n) of data for transmission, wherein each output bit comprised in the third bit stream depends on a transition in bit values between two input bits from the first bit stream. Further, the first NN generates a fourth bit stream y(n) from the third bit stream by expanding the third bit stream by a predetermined factor M. By means of a CPM signal generating module, the first NN generates a BPSK signal based on the fourth bit stream. Furthermore, the first NN transmits the BPSK signal to an OFDM signal receiving module of the second NN.