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WON-OCDMA System Based on MW-ZCC Codes for Applications in Optical Wireless Sensor Networks.

Saleh Seyedzadeh¹, Andrew Agapiou¹, Majid Moghaddasi²

¹Faculty of Engineering, University of Strathclyde, Glasgow G1 1XQ, UK.

Sensors (Basel, Switzerland)

|January 16, 2021

Summary

This study introduces a new multiweight zero cross-correlation (MW-ZCC) code for wireless optical networks. This code enhances optical sensing systems (OSS) for reliable structural health monitoring, supporting multiple services over long distances.

Keywords:

free space optics multiwavelength laser optical code division multiple access (OCDMA)optical sensors quality of service differentiation vibration sensing wireless optical networks

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Last Updated: Nov 21, 2025

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Area of Science:

Optical communication systems
Wireless optical networks
Structural health monitoring

Background:

Growing demand for extensive and reliable structural health monitoring.
Limitations of traditional fiber-based optical sensing systems.
Need for extended reach of optical sensing to remote locations.

Purpose of the Study:

Propose a novel multiweight zero cross-correlation (MW-ZCC) code for wireless optical networks based optical code division multiple access (WON-OCDMA).
Enhance quality of service (QoS) and support simultaneous transmission of diverse data types (video surveillance, comms, sensor data).
Reduce the impact of multiple access interference (MAI) in WON-OCDMA systems.

Main Methods:

Development of a new variable weight code: multiweight zero cross-correlation (MW-ZCC) code.
Application of MW-ZCC codes in wireless optical networks based optical code division multiple access (WON-OCDMA).
Performance evaluation through simulations under varying bit error rates and service requirements.

Main Results:

The proposed MW-ZCC code improves QoS and reduces MAI.
MW-ZCC codes support service differentiation through power of two code-weight properties.
Simulations show support for up to 32 simultaneous triple-play services (sensing, datacomms, video surveillance).
Successful transmission over distances up to 32 km in moderate atmospheric turbulence.

Conclusions:

The proposed WON-OCDMA system using MW-ZCC codes is effective for structural health monitoring.
The system demonstrates robust performance for supporting multiple services with varying QoS demands.
MW-ZCC codes offer a viable solution for extending optical sensing capabilities in challenging environments.