摘要
针对脉冲位置调制(PPM)超宽带(UWB)的室内多径传播以及用户数据跳时(TH)多址接入特性,提出了基于预约协议的TH-PPM UWB快速捕获方案。该方案按照某种协议,预置有关参数,依次进行初始捕获和跳时捕获,把复杂的捕获问题分解成两个相对单一的简单捕获,从而有效降低捕获难度。初始捕获获得传输时延参数,跳时捕获捕捉到目标用户,经分别证实后进入收发数据的传输,性能分析显示了该方案的有效性。
To propose an efficient acquisition scheme, some parameters are pre-decided in the process of pulse position modulation （PPM） ultra-wideband （UWB） communications under multipath and multiple access conditions. Under advanced strategy, the transmission and receive parts attain the coarse synchronization state through clock initialization and time-hopping （TH） acquisition. The former gains the transmission delay parameter, and the target user is caught by the latter. Owing to resolving the acquisition difficulty into two easy tasks in succession, this project can loose efficiently the system performance. Otherwise, by increasing correlation power, the scheme can improve the character.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第3期357-360,共4页
Systems Engineering and Electronics
关键词
通信系统
超宽带
快速捕获
communication system
ultra-wideband
fast acquisition
