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Free Space Optical communication links transmit information by laser light through an atmospheric channel. In this paper an attempt has been made to investigate the effect of atmospheric turbulence on performance of free space optical communication system. Here we have considered aperture averaging and spatial diversity techniques to improve the system performance in log-normal channel under OOK modulation...
Cooperative diversity is a promising technology for future wireless networks. Diversity combining greatly improves the performance of wireless communication systems in fading environments. However it also increase the power consumption of the receiver. In this paper, we investigate variants of known diversity combining schemes that minimize the processing power at the receiver while still providing...
The paper presents hardware design of digital signal processing based PSK demodulator using Costas loop. On the basis of analyzing the mathematical models of Costas loop, a method to model and simulate it by MATLAB is put forward. The design of LPF (low-pass filter), LF (loop filter) and VCO (voltage-controlled oscillator) are researched. It is first simulated using MATLAB in analog domain and then...
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