摘要
该文提出一种适用于大规模跳时脉冲无线电系统的低复杂度多用户检测算法。该算法采用了似然上升搜索的策略,即朝着似然函数值增加的方向进行搜索,进而得到近优的接收信号解。仿真结果表明对于大规模跳时脉冲无线电系统,该检测算法不仅能够逼近单用户系统的优异性能,而且复杂度极低,其检测每个比特的平均复杂度与用户数仅呈线性关系。
A low-complexity multiuser detection algorithm for large time-hopping impulse-radio （TH-IR） system is proposed. This algorithm adopts the likelihood ascent search scheme, which searches in the increasing direction of the likelihood function, and obtains the near-optimal received signal. The simuLation results show that for large TH-IR systems, this detector can approach the excellent performance Of single-user system with very low complexity. The average complexity for detecting one bit increases linearly with the number of users
出处
《电路与系统学报》
CSCD
北大核心
2010年第1期16-20,共5页
Journal of Circuits and Systems
基金
浙江省自然科学基金(R105473)
浙江省教育厅科技计划项目资助(20060240)
关键词
跳时脉冲无线电系统
似然上升搜索
多用户检测
time-hopping impulse-radio system
likelihood ascent search
multiuser detection
