中文摘要：

分析了窄带干扰对矢量正交频分复用（VOFDM）系统性能的影响，提出了一种VOFDM系统的窄带干扰抑制方法。该方法通过对接收矢量进行修正，把矢量子信道的接收转化为多载波码分多址（MC—CDMA）系统的接收检测问题，再采用最小均方误差合并技术实现窄带干扰抑制。性能分析及仿真结果表明，所建议的接收方法可有效提高系统对窄带干扰的顽健性，对于矢量长度为16的VOFDM，当信干比为15dB且误码率为10^-2时，本方法相比于最小平方检测有约8dB的信噪比增益。

英文摘要：

The effect of narrowband interference on the performance of vector OFDM （VOFDM） was analyzed and a narrowband interference suppression method for VOFDM was proposed. By modifying the received vector sequences, the reception over vector channels in a VOFDM system was converted to the detection in a MC-CDMA system. Then the minimum mean-square error combining （MMSEC） technique was adopted to suppress the narrowband interference. Performance analysis and simulation results show that the proposed receive method can improve the system robustness to narrowband interference. When signal-interference-ratio （SIR） is 15dB and the target bit error rate is 10^-2, the proposed method can obtain 8dB gain compared to the least square （LS） detection with the vector length being 16.