Real-time validation of receiver state information in optical space-time block code systems.

Area of Science:

• Optical communications
• Signal processing

Background:

• Free space optical interconnect (FSOI) systems address high-speed interconnect bottlenecks.
• Multiple-input multiple-output (MIMO) systems with space-time block coding (STBC) mitigate performance degradation from closely spaced optical channels.
• Accurate channel state information (CSI) is crucial for STBC system performance.

Purpose of the Study:

• To develop and demonstrate a real-time method for validating CSI in FSOI systems.
• To ensure efficient operation of FSOI systems by continuously monitoring CSI accuracy.
• To establish a link between CSI validation and system bit error rate (BER) prediction.

Main Methods:

• Implementation of a real-time CSI validation technique.
• Utilizing moving averages of maximum likelihood decoder data for validation.
• Assessing the correlation between validated CSI and predicted BER.

Main Results:

• Successful demonstration of real-time CSI validation in FSOI systems.
• The proposed method effectively predicts the bit error rate (BER) of the system.
• Validation ensures optimal performance of STBC-based FSOI systems.

Conclusions:

• Real-time CSI validation is essential for maintaining FSOI system efficiency.
• The moving average method provides a reliable approach for CSI validation and BER prediction.
• This technique enhances the robustness and reliability of high-speed optical interconnects.