脉冲无线电UWB系统在定时抖动下处理增益的权衡
The Trade-off between Processing Gains of an Impulse Radio UWB System in the Presence of Timing Jitter
摘要：
在跳时脉冲无线电中，为每个信息符号发送持续时间为$T_c$的$N_f$脉冲。这产生两种类型的处理增益：（i）脉冲组合增益，其为因子$N_f$，以及（ii）脉冲扩展增益，其为$N_c=T_f/T_c$，其中$T_f$为两个后续脉冲之间的平均间隔。本文探讨了这两种类型的处理增益之间的权衡存在的定时抖动。首先，一个加性高斯白噪声（AWGN）信道被认为是和近似封闭形式的表达式推导出脉冲无线电系统的比特错误概率与脉冲极性随机化。符号同步和码片同步场景都被考虑。通过理论分析，说明了多址干扰和定时抖动对系统最佳参数选择的影响。最后，多径的情况下，被认为是与基于脉冲的极性随机化的同步脉冲无线电系统的处理增益之间的权衡进行了分析。研究了定时抖动、多址干扰和帧间干扰对系统性能的影响。仿真研究支持理论结果。
英文摘要：
In time hopping impulse radio, $N_f$ pulses of duration $T_c$ are transmitted for each information symbol. This gives rise to two types of processing gain: (i) pulse combining gain, which is a factor $N_f$, and (ii) pulse spreading gain, which is $N_c=T_f/T_c$, where $T_f$ is the mean interval between two subsequent pulses. This paper investigates the trade-off between these two types of processing gain in the presence of timing jitter. First, an additive white Gaussian noise (AWGN) channel is considered and approximate closed form expressions for bit error probability are derived for impulse radio systems with and without pulse-based polarity randomization. Both symbol-synchronous and chip-synchronous scenarios are considered. The effects of multiple-access interference and timing jitter on the selection of optimal system parameters are explained through theoretical analysis. Finally, a multipath scenario is considered and the trade-off between processing gains of a synchronous impulse radio system with pulse-based polarity randomization is analyzed. The effects of the timing jitter, multiple-access interference and inter-frame interference are investigated. Simulation studies support the theoretical results.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
