摘要
针对传统欠定盲源分离算法恢复精度低的问题,提出了改进的欠定变速跳频信号盲分离算法。该算法通过对混合矩阵估计与源信号恢复进行改进,在一定程度上提高了对变速跳频信号盲分离的精确程度。仿真实验表明,恢复信号与源信号相似度在良好信道环境下可以达到90%;在相同条件下,算法的估计误差可以达到约-60 dB。
Aiming at the problem that the traditional underdetermined blind source separation algorithm was of low recovery accuracy,an improved blind separation algorithm for underdetermined variable frequency hopping signals was proposed.The algorithm was improved on the basis of the"two-step method".Simulation experiments showed that the similarity between the recovered signal and the source signal could reach 90%under good channel conditions;under the same conditions,the estimation error of the algorithm could reach about-60 dB.
作者
王淼
蔡晓霞
雷迎科
WANG Miao;CAI Xiaoxia;LEI Yingke(Electronic Countermeasure Institute,National University of Defense Technology,Hefei 230037,China)
出处
《探测与控制学报》
CSCD
北大核心
2020年第2期79-85,共7页
Journal of Detection & Control
关键词
欠定盲源分离
变速跳频信号
“两步法”
underdetermined blind source separation
variable speed frequency hopping signal
two-step method
