Electronic and Communication - Engineering

Abstract : In the mobile radio environment, signals are usually impaired by fading and multipath delay spread phenomenon. In such channel, severe fading of the signal amplitude and Inter-Symbol Interference (ISI) lead to unacceptable degradation of the system error performance. It is expected that Orthogonal Frequency Division Multiplexing (OFDM) is capable of providing very high data rate with strong robustness of multipath delay spread, which make that ISI is no longer a problem.

Abstract : The idea of multiprocessor is a technique or mechanism that is implemented for long years, but with the need for increasing of computational speed and accuracy, taking into account that the progress in technique in this field is rare in Iraq. This encouraged the implementing of this work in order to build a DSP kit helping Iraqi researcher at universities in their search with minimum cost.

Abstract : The aim of this thesis is to design an effective and easy-to-handle system to analyze signals that contain subharmonic frequency components in its spectrum using a micro-computer based system. Subharmonic generation is widely occurring for low frequency bands especially at power frequencies, 50 Hz or 60 Hz, when these signals are used in energy processing. One of the famous techniques is called integral-cycle control or Amplitude Modulation of power signal.