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Differential quadrature phase shift keying (DQPSK) encodes the phase change from one symbol period to the next. The precoder is designed for this purpose. The main objective of this paper is to design a simple precoder of the DQPSK transmitter. The precoder is designed using various blocks such as multiplexers, logic gates and flip-flops. The blocks are designed using Mach–Zehnder Interferometer-Semiconductor...
A systematic model for all-optical full adder as well as full subtractor is proposed based on principle of Mach Zehnder Interferometer and using Semiconductor Optical Amplifier (MZI-SOA) configuration. MZI plays a role for ultra fast all-optical signal processing, here the non-linear property of SOA are properly utilized for designing the full adder as well as full subtractor. In this model the full...
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