Indoor optical wireless communication system with filters-enhanced generalized spatial modulation and carrierless...

Area of Science:

• Optical Wireless Communication
• Modulation Schemes
• Signal Processing

Background:

• Spatial modulation is key for high-speed indoor optical wireless communication (OWC).
• Existing methods require accurate channel state information (CSI) and low channel correlation, limiting performance.
• Increasing data rates in OWC systems remains a significant challenge.

Purpose of the Study:

• To propose and demonstrate a novel indoor OWC system.
• To enhance data rates by combining filters-enhanced generalized spatial modulation (FE-GSM) with 16-carrierless amplitude and phase (16-CAP) modulation.
• To eliminate the need for CSI and reduce channel correlation requirements.

Main Methods:

• Implementation of a filters-enhanced generalized spatial modulation (FE-GSM) scheme.
• Integration of 16-carrierless amplitude and phase (16-CAP) modulation to boost symbol domain data rates.
• Simultaneous activation of multiple transmitters within the FE-GSM framework to increase spatial domain data rates.

Main Results:

• Achieved a data rate of 15 Gb/s using an indoor OWC system with three transmitters operating at 2.5 GBaud/s.
• Demonstrated successful high-speed data transmission under identical channel conditions.
• Validated system performance without requiring pre-known channel state information (CSI).

Conclusions:

• The proposed FE-GSM scheme combined with 16-CAP modulation significantly increases data rates in indoor OWC systems.
• The system offers a promising solution for high-speed indoor wireless optical communication.
• The elimination of CSI requirements simplifies system implementation and broadens applicability.