This paper proposed a new impulse radio ultra wideband (IR-UWB) signal to reduce interference on narrowband systems at high usage 5.2 GHz frequency. The combination of 4th and 5th order derivatives of Gaussian pulses were employed to generate the signal so that satisfy the US Federal Communications Commission (FCC) mask. The genetic algorithm technique was used to find the pulse optimized parameters. In this paper, spectrum was optimized by changing the shape factor (sigma) and amplitude of Gaussian pulses so that the transmitted power spectrum density was minimized at a frequency of 5.2 GHz and maximized at the other frequencies from 3.1 to 10.6 GHz according to the FCC mask. The signal was applied in an IR-UWB transceiver system with binary-phase shift keying modulation. The IR-UWB waveform is generated by a programmable digital to analog based circuit. The proposed system was compared with conventional IR-UWB systems at the same condition. The simulation results in multipath channel showed that the proposed system not only reduced interference with the narrowband system, but also this was robust against narrowband interference at 5.2 GHz frequency.

本文提出了一种新的脉冲无线超宽带（IR-UWB）信号，以减少在5.2 GHz高频率下对窄带系统的干扰。高斯脉冲的四阶和五阶导数的组合用于生成信号，从而满足美国联邦通信委员会（FCC）的要求。使用遗传算法技术找到脉冲优化参数。在本文中，通过改变高斯脉冲的形状因子（sigma）和振幅来优化频谱，从而根据FCC，在5.2 GHz的频率下，发射功率谱密度最小，而在其他频率从3.1到10.6 GHz时，发射功率谱密度最大。面具。将该信号应用于具有二进制相移键控调制的IR-UWB收发器系统。IR-UWB波形由基于可编程数字模拟的电路生成。在相同条件下，将建议的系统与常规IR-UWB系统进行了比较。在多径信道中的仿真结果表明，所提出的系统不仅减少了对窄带系统的干扰，而且对于5.2 GHz频率下的窄带干扰也很健壮。