分析了一种直接序列与跳时码混合的超宽带多址系统(DS/TH-UWB),并针对该系统提出了一种简单可行的误比特分析法。它是基于 Holtzman 的简化改进的高斯近似(SIGA),并已成功应用于 DS-CDMA 系统中。文章首先给出了系统模型,然后对该系统进行了分析,并推出了具体误比特率表达式,最后对 SGA 和 SIGA 的方法进行了仿真比较。结果表明,此方法可以有效地应用于超宽带(UWB)多址系统中。 An ultra wideband multiple access system (DS / TH-UWB) with direct sequence and hopping time code is analyzed. A simple and feasible bit error analysis method is proposed for this system. It is a simplified and improved Gaussian approximation (SIGA) based on Holtzman and has been successfully used in DS-CDMA systems. The article first gives the system model, then analyzes the system, and introduces the specific bit error rate expression. Finally, the methods of SGA and SIGA are simulated and compared. The results show that this method can be effectively applied to UWB multiple access systems.