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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。
According to the characteristics of ultra-wideband communication, there is a serious interference in the narrow band, and its anti-jamming algorithm is studied. The multi-carrier CDMA technology is combined with orthogonal spreading and interleaving techniques to make full use of the frequency diversity and spreading gain between channel subbands and subcarriers to suppress or even eliminate the influence of narrowband interference on the UWB system, optimize. The theoretical analysis and simulation results show that the proposed algorithm can effectively suppress narrowband interference both in large SINR and small SINR, reducing the systematic bit error rate by 1 to 2 orders of magnitude or improving SINR by 5 ~ 10 dB , Improve the system’s ability to resist narrowband interference.