为了提高信息传输速率、灵活利用频谱，从多波段脉冲超宽带（multiband impulse radio UWB，MB-IR-UWB）系统的工作原理出发，结合有限项扁长椭球波函数（prolate spheroidal wave function）良好的带限和正交特性，提出了一种新的多波段频谱划分方式，在此基础上搭建系统模型。通过推导给出在高斯白噪声背景下，采用TH-BPPM调制时的平均误比特率公式，并进行系统性能分析。仿真结果表明，在保证各波段间不干扰条件下，MB-IR-UWB 与单波段UWB系统有相同的误码性能，PSWF脉冲可用于数据的并行传输，信息传输速率有大幅度提高。同时，脉冲持续时间影响系统的误码性能，Tm=6 ns是波段数N=15时对应的最佳脉冲持续时间。
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