【摘要】 频谱共存及兼容是超宽带(UWB)无线通信系统必须考虑的重要问题。为了避免超宽带系统对现有窄带无线系统的干扰,一个有效的方法是设计合适的脉冲波形。在建立超宽带脉冲设计算法的基础上,分析了扁长椭球波函数(PSWF)的近似解,提出了用近似扁长椭球波函数(APSWF)进行脉冲波形设计的方法。近似扁长椭球波函数具有简单明确的数学表达式,仿真表明用其设计的脉冲功率谱符合FCC频率掩模的约束要求。当频率掩模发生变化时,可方便地调整参数以产生新的脉冲。更多还原

【Abstract】 Coexistence and compatibility was an important issue needed to be considered in ultra-wideband (UWB) impulse radio communications.To avoid interference,one of the effective methods was to design appropriate pulse waveform.UWB pulse design algorithm was established,the approximate solution to the prolate spheroidal wave functions (PSWF) was analyzed,a pulse design method was proposed by using the approximate prolate spheroidal wave functions (APSWF).The mathematical expression of APSWF was simple and explicit.The simulation shows that pulse based on APSWF meets the power spectral constraint of the FCC’s spectral mask.The APSWF-based pulse waveform can be flexibly adjusted by this method when the spectral mask changes.更多还原