원문정보
초록
영어
Phase noise is produced in local oscillator or PLL(phase locked loop), which affects seriously BER performance of the OFDM (orthogonal frequency division multiplexing) system. ICI (inter-sub-carrier-interference) caused by the phase noise is a serious problem. In this paper, two modified ICI self-cancellation methods are proposed and compared for the performance evaluation. In the original OFDM system, the proposed symmetric data-conjugate method has the best ICI minimization capability, which becomes gradually degraded according to the order of symmetric data-conjugate method, data-conjugate method, symmetric data-conversion method and data-conversion method. When phase noise dominates in the OFDM system, symmetric data-conjugate method can result in the best BER performance, when HPA nonlinearity cannot be neglected, data-conjugate method achieves the best BER performance.
목차
1. Introduction
2. Phase Noise in the OFDM System
2.1. OFDM System
3. Modified ICI Self-Cancellation Methods
3.1. Proposed Symmetric Data-conjugate Method
3.2. Proposed Symmetric Data-conversion Method
4. Simulation Results and Discussion
5. Conclusions
Acknowledgements
References