CAJ | 학술논문

提出了一种用于上行OFDM-IDMA系统中的低复杂度的多频偏抑制方法。在该方法中，多频偏在频域通过两个步骤得以抑制。频域接收信号分别与每个用户的频域频偏校正因子进行圆周卷积以达到抑制各用户自身频偏的目的，再进一步采取一种低复杂度的信号检测方法来消除其他用户频偏的影响。仿真结果表明，提出的低复杂度的多频偏抑制方法不但能够达到传统方法的性能，而且能有效地降低计算复杂度。
제출료일충용우상행OFDM-IDMA계통중적저복잡도적다빈편억제방법。재해방법중，다빈편재빈역통과량개보취득이억제。빈역접수신호분별여매개용호적빈역빈편교정인자진행원주권적이체도억제각용호자신빈편적목적，재진일보채취일충저복잡도적신호검측방법래소제기타용호빈편적영향。방진결과표명，제출적저복잡도적다빈편억제방법불단능구체도전통방법적성능，이차능유효지강저계산복잡도。
A low-complexity multiple Carrier Frequency Offset(CFO)compensation method is proposed for OFDM-IDMA uplink. The multiple CFOs are compensated by a two-stage approach in the frequency domain. The received signal in the frequency domain is circular multiplied by the CFO correction factor to compensate the every user’s self CFO separately. A low-complexity signal detection method is adopted to cancellthe impact of the residual CFOs from other users. Simula-tion results show that the proposed low-complexity multiple CFO compensation method can obtain the same performance of the conventional method and also significantly reduce the complexity.