【作者】 林青； 邱敏华； 朱谦； 胡波； 邵谦明；

【Author】 Lin Qingl, Qi u Minhua, Zhu Qian, Hu Bo, Shao Qianming (Department of Communication Science and Engineering Fudan University, ShangHai, 200433)

【机构】 复旦大学信息科学与工程学院；

【摘要】 伪混沌跳时是一种适用于超宽带脉冲无线电通信系统的调制方法。本文首先介绍了一种用于UWB脉冲无线电改进的伪混沌跳时方案。这种方案采用了一种混沌映射——多帐篷映射。并在文章的最后,列举了一种适合多帐篷映射的DSP实现方法。相比原有的帐篷映射,多帐篷映射具有诸如能满足不同用户需求的灵活的数据速率,对信道状态的适应性等优点。本文提出的DSP实现方法是建立在对功率谱密度和系统的比特误码率等参数仿真结果的基础上,基于分形的编／解码方法。更多还原

【Abstract】 Pseudo-chaotic time hopping is a modulation method which is suitable for ultra wide-bandwidth impulse radio communication systems. In this paper, we present an improved pseudo-chaotic time hopping scheme for UWB impulse radio. This scheme utilizes multi-tent map, a kind of chaotic map. At the and of the paper, we present a DSP solution scheme which fits for multi-tent map. We find that compared to original tent-map, multi-tent map has some advantages such as flexibility of data rate to satisfy different users’ needs and adaptability to channel status. After simulation, including estimation of the power spectral density and BER performance of the system, we further present a DSP solution scheme based on fractral algorithm in data recovery at receiver.更多还原