| 摘要: |
| 强直达波干扰（DPI）抑制是GSM无源探测系统中的首要问题。根
据系统中DPI与目标回波的特征差异，提出了一种新的宽零陷空域DPI抑制算法。该算法基于
干扰和回波的DOA信息，采用改进的最小约束最小方差准则来实现特定方位上的空域滤波，
能够在对目标回波进行波束赋形的同时有效抑制DPI。仿真结果表明，该算法能获得不低于5
5 dB的抑制增益。 |
| 关键词: GSM 无源探测 直达波干扰 空域滤波 |
| DOI： |
|
| 基金项目:陕西省自然科学基金资助项目（SJ08F11,2009JQ8020） |
|
| A novel spatial broad nulling algorithm for DPI suppression in GSM-based passive detection systems |
| WANG Chang,LI Yuan,MAO Liu-jun,GUO Jian-xin |
| () |
| Abstract: |
| The major problem in GSM-based passive detection systems is how to suppress the
strong direct path interference(DPI) effectively. According to the feature diffe
rences between the DPI and echo signals, a novel spatial broad nulling algorithm
is presented for DPI cancellation. With the help of the Direction of Arriv
al（DOA） information, broad and deep spatial filtering based on the linear con
straint minimum variance(LCMV) criterion can be implemented in the DPI direction
. Simulation results show that at least 55 dB suppression gains can be achie
ved by using the proposed algorithm. |
| Key words: GSM passive detection DPI spatial filtering |
