双选择性信道条件下OFDM系统的频域Turbo均衡

Frequency-domain Turbo Equalization for OFDM Systems Over Doubly-Selective Channels

未来OFDM系统将工作在高载频、高容量、高移动速率的条件下,传统的单抽头频域均衡器将不再适用。该文基于双选择性信道的ICI分析,提出了一种用于OFDM系统的频域Turbo均衡(Frequency-domain Turbo Equalization,FTE)算法。仿真表明该算法具有BER性能好,计算复杂度低的优点,能够很好地抑制ICI。

The future OFDM systems are expected to operate at high transmit frequencies, at high capacities, at high levels of mobility, and the traditional one-tap equalizer is not applicable any more. In this paper, a novel frequency-domain Turbo equalization （FTE） technique for OFDM systems over doubly-selective channels is presented based on the analysis of the ICI generation mechanism. Simulation results indicate the presented approach has significant BER performance and complexity advantages, can mitigate ICI effectively over doubly-selective channels.