RBF multiuser detector with channel estimation capability in a synchronous MC-CDMA system

Area of Science:

• Electrical Engineering
• Signal Processing
• Telecommunications

Background:

• Multicarrier-code division multiple access (MC-CDMA) systems offer advantages in combating frequency-selective fading.
• Efficient multiuser detection and accurate channel estimation are critical for system performance.
• Existing methods may not fully exploit frequency diversity for enhanced user capacity.

Purpose of the Study:

• To propose a novel multiuser detector with integrated channel estimation capabilities for MC-CDMA systems.
• To leverage radial basis function (RBF) networks for improved performance.
• To enhance the utilization of frequency diversity within the MC-CDMA framework.

Main Methods:

• A radial basis function (RBF) network was designed and integrated into the receiver architecture.
• The RBF network was connected to the frequency domain to exploit frequency diversity.
• Simulations were conducted on frequency-selective and multi-path fading channels.

Main Results:

• The proposed RBF network demonstrated effective channel estimation capabilities.
• The RBF network functioned effectively as a multiuser detector.
• Simulations confirmed the receiver's ability to increase the number of active users.

Conclusions:

• The proposed RBF network-based receiver is suitable for both channel estimation and multiuser detection in MC-CDMA systems.
• Integrating RBF networks into the frequency domain enhances MC-CDMA system performance.
• The developed approach allows for a significant increase in the number of active users in the system.