High-speed duplex optical wireless communication system for indoor personal area networks

Area of Science:

• Wireless communication systems
• Optical wireless communication
• Radio frequency localization

Background:

• High-bandwidth indoor wireless access is crucial for emerging applications like personal area networks.
• Existing wireless technologies face limitations in achieving both high data rates and precise localization simultaneously.
• Free space optical wireless offers high bandwidth but typically lacks mobility and localization capabilities.

Purpose of the Study:

• To propose and demonstrate a novel hybrid wireless access system integrating free space optical wireless and radio frequency localization.
• To achieve multi-gigabit per second data transmission speeds for indoor applications.
• To enable subscriber localization and limited mobility within an office environment.

Main Methods:

• Development of a hybrid system combining line-of-sight free space optical wireless links with radio frequency localization.
• Utilizing simulations to investigate system architecture and identify performance trade-offs.
• Conducting proof-of-concept experiments to validate the simulation model and system feasibility.

Main Results:

• Demonstration of a system supporting several gigabits/second upstream and downstream data transmission.
• Achieved bit error rates better than 10(-9) over the entire room with 5 dBm transmitted power, even in strong background light.
• Experimental validation of a 2.5 Gbps optical wireless link over 1-2 m with a 45-degree diffused beam in an indoor setting.

Conclusions:

• The proposed hybrid system is well-suited for high-bandwidth indoor applications requiring both high data rates and localization.
• The system demonstrates feasibility and satisfactory performance, paving the way for advanced indoor wireless networks.
• This integration overcomes limitations of individual technologies, offering a robust solution for future wireless access.