Free space optical network gained increasing visibly as a broadband communication network over traditional wireless networks because of their high bandwidth (up to Gbps), low cost easy installation and also license free long range spectrum. Existence of line of site and alignment between the nodes is one of the key requirements for free space optical communication. In this paper the free space ...

We have investigated the performance improvement of cooperative free space optical (FSO) communication over single input single output (SISO) system in this paper. Bit error rate (BER) analysis for gammagamma channel model with additive white Gaussian noise (AWGN) has been demonstrated for SISO and cooperative system as well where the performance improvement with different combining techniques ...

The paper discusses a low power consumption, light weight and low cost 10MHz free-space optical communication (FSO). The system is designed for mounting on mobile platforms, with effective range of at least 50 meters. LightEmitting Diodes (LEDs) and Laser diodes (LDs) are used in the transmitter for comparison for their relative performance in the system. The receiver features a beam splitter t...

In the past three decades, the demand for high-speed communications has increased dramatically, while fiber optical communications has been applied in the majority of data transmission networks. Optical fiber has advantages over existing copper wire in long distance and high demand applications. The ever increasing need for higher bandwidth and higher speed optical data and communications trans...

A prominent landmark in the extension of Shannon information theory to the quantum domain is the realization that any particular physical system can store only a finite amount of information. As a consequence, the quantity of information that can be exchanged in any communication process is limited by the available physical resources. Two of the main results in this regard are the Holevo bound ...

Complementing wireless radio networks with free-space optics (FSO) achieve high data rates by modulating radio subcarriers over an optical carrier without expensive optical fiber cabling, enabling a pervasive platform for reaching underserved areas. In this paper, we review the main features of Free Space Optical Communication. Keywords— Free space Optics, NRZ, RZ, PIN, APD etc.