Impulse-Radio (IR) is a wideband modulation technique that can support multiple users by employing random Time-Hopping (TH) combined with repeated transmissions. The latter is aimed at alleviating the impact of collisions. This work employs a graphical model for describing the multiuser system which, in turn, facilitates the inclusion of general coding schemes. Based on factor graph representation of the system, several iterative multiuser detectors are presented. These detectors are applicable for any binary linear coding scheme. The performance of the proposed multiuser detectors is evaluated via simulations revealing large gains with low complexity.

翻译：脉冲-射频(IR)是一种宽频调制技术,可以使用随机时间定位(TH)和多次传输来支持多用户,后者旨在减轻碰撞的影响,这项工作采用图形模型描述多用户系统,这反过来又有助于纳入一般编码办法。根据系统要素图,提供了若干迭代多用户探测器。这些探测器适用于任何二进制线性编码办法。通过模拟评估拟议的多用户探测器的性能,模拟显示低复杂性的巨大收益。