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为了改善主用户窄带干扰下的传输参考超宽带系统的性能,提出了一种认知传输参考超宽带系统.认知传输参考超宽带系统的发射机在检测主用户工作的频段后,采用在该频段陷波的椭球波发射脉冲以降低对主用户的干扰;接收机在相关接收处理前采用陷波滤波来降低主用户带来的窄带干扰.仿真结果表明:该系统在信干比为0dB的单个或2个窄带干扰影响下,误码性能接近于无窄带干扰下的系统性能;在信噪比为10dB且信干比在-20～10dB范围内变化时,误码性能变化不超过一个数量级.该系统具有极佳的抗窄带干扰能力,误码性能在不同信噪比下具有很强的健壮性,具有对同频段主用户更小的干扰.
In order to improve the performance of the primary user’s narrowband interference transmission reference ultra-wideband system, a cognitive transmission reference ultra-wideband system is proposed.The transmitter of cognitive transmission ultra-wideband system, after detecting the frequency band of the primary user’s work, The notch notch ellipsoidal wave is transmitted to reduce the interference to the primary user. The receiver uses the notch filter to reduce the narrowband interference caused by the primary user before the relevant receive processing. The simulation results show that the system has a better signal-to-interference ratio of 0dB Under the influence of single or two narrow-band interferences, the error performance is close to the system performance without narrow-band interference. When the signal-to-noise ratio is 10dB and the SINR varies within the range of -20 ~ 10dB, the error performance does not change more than one Order of magnitude.The system has excellent anti-narrowband interference ability, bit error rate performance under different signal to noise ratio has a strong robustness, with the same frequency of the main user of the smaller interference.