中文摘要：

根据超宽带通信存在严重窄带干扰的特点,研究其抗干扰算法。将多载波码分多址技术与正交扩展、交织技术相结合,充分利用信道子带与子载波间的频率分集性以及扩频增益,抑制甚至消除窄带干扰对UWB系统的影响,实现系统的最优化。理论分析和仿真结果表明,这种算法无论是在大信干比还是在小信干比时都能有效抑制窄带干扰,使得系统误比特率降低1～2个数量级或者信干比改善5～10dB,提高了系统的抗窄带干扰能力。

英文摘要：

An improved anti-interference algorithm was proposed,which was used to combating the detrimental effects of interference on the multi-band orthogonal frequency-division multiplexing ultra-wideband system.The algorithm is based on multi-carrier code division multiple access as well as spreading and interleaving,and makes full use of the advantages of frequency diversity across the sub-bands and sub-carriers.It would suppress even cancel the effect of narrowband interference on the UWB system in virtue of spread spectrum,and optimize the system.The bit error rate performance of the system was analyzed.Simulating results show that the scheme could suppress the narrow-band interference effectively and improve the performance 1～2 exponential quantity in bit error rate or 5～10 dB in signal-to-interference ratio.