We present a new approach for signal separation from an undetermined instantaneous mixture of two BPSK (Binary Phase Shift Keying) signals in AWGN (Additive White Gaussian Noise) channel. The method uses frequency diversity of the mixture (frequency shift between carriers) and the fact that signals of interest are binary variables. We compare separation results of our method to a theoretical BE...

In the context of this example, the alphabet has only two symbols 0 and 1. When the alphabet consists of just two symbols, the symbols are called bits. The modulation method is a variant of frequency modulation (FM) of some carrier frequency ωc. Frequency shift keying (FSK) conveys information by decreasing the carrier frequency for the duration of a 0 symbol and increasing the frequency for th...

The authors model and characterise the performance of 10 Gbit/s 4-ary amplitude shift keying (ASK) systems in dispersive environments at 1550 nm. Both non-return-to-zero (NRZ) and return-to-zero (RZ) formats are examined, with comparisons to on-off keying (OOK) in each case. Both single amplified links and cascaded fibre-amplifier links are modelled. While 4-ary ASK systems suffer a back-to-bac...

Based on a novel class of orthogonal pulse pairs, new full-response quadrature-quadrature phase-shift keying (QPSK) signal format is proposed in the paper. The proposed full-response QPSK signals can provide higher spectral compactness than conventional fullresponse QPSK signal, minimum-shift keying signal and quadrature phase-shift keying signal.

The synthesis method of the incoherent demodulation procedure two synchronous mutually non-orthogonal digital signals with frequency modulation is considered. In absence interference this degenerates into classical a signal modulation. When instantaneous power one significantly exceeds other, immunity latter approaches reception in channel additive white Gaussian noise without interference. Thi...