This paper investigates how to increase communication distance of underwater wireless optical communication system. In order to analyze the communication distance of UWOC, the performance of optical transmitter and receiver, underwater channel characterization and modulation schemes were discussed. The communication link model was established based the on Beer-Lambert Law. The suitable transmit...

Infrared wireless communication possesses two main attractive advantages over its radio frequency counterpart, namely the abundance of unregulated spectrum in 1.3 μm–1.55 μm region and the ease with which the infrared radiation can be confined. Integrating microwave electronics and optics, it is possible to provide wideband communication services but it is well known that the signal level in an...

SUMMARY Optical wireless communications is a research topic of extreme interest since it offers high data rate (Gbps data rate), security, and RF interference immunity. However, optical wireless communications places severe restrictions on the communications paths; they must be direct beam connections. To increase the number of users and link robustness, optical wireless communications must be ...

Infrared wireless communication possesses two main attractive advantages over its radio frequency counterpart, namely the abundance of unregulated spectrum in 1.3 μm–1.55 μm region and the ease with which the infrared radiation can be confined. Integrating microwave electronics and optics, it is possible to provide wideband communication services but it is well known that the signal level in an...

Broad spectrum of optical wireless communication is available, which can fulfill the requirements of high speed wireless communication. This is the basic advantage of optical wireless communication over conventional wireless communication technologies. The other important thing is the day by day decreasing size of wireless sensors with the advent of advancement in device processing technologies...

Power link budgets are prepared for wireless optical communication systems to illustrate the optical losses that happens during transmission. This paper has presented optical wireless links which offer ultra multi gigabit per second data rates and low system complexity. For ground space and or terrestrial communication systems, these links suffer from atmospheric loss mainly due to fog, and sci...

This article overviews optical wireless communications using multiple-subcarrier modulation (MSM). The basic principles and characteristics of the optical wireless communications using MSM are presented. The optical wireless systems using MSM are explained where some block codes that convert information bits to be transmitted to the symbol amplitudes of subcarriers are used to increase the mini...

It is commonly accepted that the next generation of wireless communication systems, usually referred to as 4G systems, will not be based on a single access technique but it will encompass a number of different complementary access technologies. The ultimate goal is to provide ubiquitous connectivity, integrating seamlessly operations in most common scenarios, ranging from fixed and low-mobility...