Performance Evaluation of Wireless Multi-Carrier (MC) Communication Systems

TL;DR

This paper evaluates the performance of wireless multi-carrier systems, specifically OFDM, focusing on CFO tracking and data-aided schemes, demonstrating faster acquisition and improved BER through novel dual bandwidth and pilot tone methods.

Contribution

Introduces a dual bandwidth CFO tracking scheme with clustered pilot tones that enhances acquisition speed and system BER in OFDM systems.

Findings

Proposed dual bandwidth scheme reduces CFO acquisition time.

Clustered pilot tones further improve CFO tracking performance.

System BER is significantly improved with the new schemes.

Abstract

This thesis is concerned with data-aided (DA) scheme and CFO tracking for OFDM system. OFDM system model is developed first without CFO and then with CFO. The system performance is evaluated via simulation. The bit error rate (BER), constellation diagram, the phase output and phase error were taken as performance measures. The performance is evaluated for different types of modulation over different channel conditions. In this thesis, a dual bandwidth for CFO tracking based on type-2 control loop to reduce the acquisition time of PLL is proposed. It is proved that the proposed scheme is significantly faster than, and improves the system BER. Also, further refinement to the dual bandwidth scheme is improved by using clustered pilot tones. The improved dual bandwidth scheme is better than the dual bandwidth scheme.