Bipolar Optical Code Division Multiple Access Techniques Using a Dual Electro-Optical Modulator Implemented in...

Area of Science:

• Optical Communications
• Wireless Technology
• Signal Processing

Background:

• Existing bipolar optical code division multiple access (Bi-OCDMA) schemes face limitations in transmission rates and interference management.
• Wireless optical communication systems require efficient methods for signal formation and transmission.

Purpose of the Study:

• To develop an advanced Bi-OCDMA technique using spectral amplitude coding for optical-polarized signals.
• To improve transmission rates and mitigate multiple access interference in wireless optical channels.

Main Methods:

• Development of a Bi-OCDMA technique based on spectral amplitude coding.
• Implementation of a free-space optics communication system with a dual electro-optical modulator design.
• Utilizing correlation subtraction schemes to remove multiple access interference.

Main Results:

• The proposed system demonstrates improved transmission rates compared to conventional Bi-OCDMA schemes.
• Accurate extraction of codewords from an M-sequence and reconstruction of original data were achieved.
• The system successfully eliminated multiple access interference through correlation subtraction.

Conclusions:

• The developed Bi-OCDMA technique offers enhanced performance for wireless optical communications.
• The proposed architecture is easily implementable, cost-effective, and suitable for broadening Bi-OCDMA applications.