国防科技大学学报2011，Vol.35Issue(5)：128-133,6.
窄带假设对GNSS天线阵抗干扰性能评估的影响分析
The Influence Analysis of Narrowband Hypothesis to GNSS Array Anti-jamming Performance Evaluation
聂俊伟 1葛锐 1李敏 1王飞雪1
作者信息
- 1. 国防科技大学电子科学与工程学院,湖南长沙410073
- 折叠
摘要
Abstract
The traditional method analyzes the anti-jamming biases by using narrow-band model Hypothesis. On the other hand, next-generation GNSS signals using wider bandwidth make the broadband effect more obviously. Therefore, the impact of narrow-band assumptions needs to be re-examined. This research derives the precise model under the case of DBF processing, and the conclusion is that the array response equals to the inner product of spatial steer vector and the Kroneck product of time steer vector and weights of taps. The research also analyzes the array anti-jam performance biases by narrowband assumption under the multiple factors. The results show that the main reason is the distortion of array response. When JSR is 70dBc, the maximum error introduced by narrow-band approximation model is about 5dB. The intenser the jamming, the bigger the error. At the same time, the error introduced by the above precise model is about 0.5dB.关键词
GNSS/变频处理/抗干扰天线阵/窄带假设/性能评估Key words
Global Navigation Satellite Systems (GNSS)/ freq down conversion/ anti-jam antenna array/ narrowband assumption/ performance evaluation分类
信息技术与安全科学引用本文复制引用
聂俊伟,葛锐,李敏,王飞雪..窄带假设对GNSS天线阵抗干扰性能评估的影响分析[J].国防科技大学学报,2011,35(5):128-133,6.
