CAJ | 학술논문

为提高正交频分复用（OFDM）系统在快速衰落环境下的性能，提出了基于自消除子载波间干扰（ICI）的频域差分 OFDM系统。发送端采用相邻子信道插零分配子载波，接收端通过符号旋转抵消抑制 ICI。该系统在快速时变的信道和较大 ICI 情况下，既保证通信质量又降低了系统实现复杂度。分析和仿真结果表明：提出的方案与迭代消除 ICI 方案相比，可在频谱效率一样的前提下，以较低复杂度获得更低误码率。
위제고정교빈분복용（OFDM）계통재쾌속쇠락배경하적성능，제출료기우자소제자재파간간우（ICI）적빈역차분 OFDM계통。발송단채용상린자신도삽령분배자재파，접수단통과부호선전저소억제 ICI。해계통재쾌속시변적신도화교대 ICI 정황하，기보증통신질량우강저료계통실현복잡도。분석화방진결과표명：제출적방안여질대소제 ICI 방안상비，가재빈보효솔일양적전제하，이교저복잡도획득경저오마솔。
In order to improve the performance of orthogonal frequency division multiplexing (OFDM)system under the fast fading channel,a frequency domain differential OFDM system based on inter-carriers interference (ICI)cancellation was proposed.At the sending terminal,the allocation of sub-carriers by inserting zero in adjacent sub-channels,and at the receiv-ing end,ICI interference was cancelled by rotating the receiver symbol in the system.In the fast fading channel and big ICI, the quality of communication can be ensured by the system proposed,with reduced complexity.Simulation results show that the proposed scheme achieves lower BER than iterative ICI cancellation scheme under the same spectrum efficiency con-straint.It is also proved that the proposed scheme has lower complexity than iterative ICI cancellation scheme.