摘要
通过设置保护区并结合传统的跳时序列,构造了一类适用于近似同步跳时扩谱超宽带无线电通信系统的跳时序列,该类序列具有两级的低碰撞区。在所设计的跳时低碰撞区内,该类序列不仅具有与零碰撞区跳时序列极为接近的跳时相关性能,而且克服了零碰撞区跳时序列为保证序列的正交性所带来的序列数目少和过区性能突降这两个弊端。
By combining the design of safeguard zone and traditional time-hopping （TH） sequences, we construct a class of TH sequences with two-stage few-hit zone （FHZ） suitable for quasi-synchronous time-hopping spread spectrum ultra wideband （QS-THSS-UWB） systems. The constructed sequences not only have good TH correlation properties which are very close to those of TH sequences with no-hit zone （NHZ）, but also they overcome two disadvantages of the small family size and the rapidly degradation in TH correlation properties which result from the orthogonality between TH sequences with NHZ.
出处
《通信学报》
EI
CSCD
北大核心
2005年第10期53-59,共7页
Journal on Communications
基金
国家自然科学基金资助项目(60272083)
重庆市应用基础项目(7364)
关键词
超宽带无线电
跳时序列
跳时零/低碰撞区
近似同步
ultra wideband radio
time-hopping sequences
no-hit and few-hit zone
quasi-synchronous
