无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
8期
31-33,58
,共4页
低仰角%多径效应%对称波束%差波束相位跳变
低仰角%多徑效應%對稱波束%差波束相位跳變
저앙각%다경효응%대칭파속%차파속상위도변
low elevation%multipath%symmetric beam%difference beam phasetoggling
采用阵列天线跟踪低仰角目标时需要克服多径效应的影响。建立了低仰角环境下的二径模型，在此基础上研究了对称波束消除多径效应的原理和约束条件，提出了一种利用相邻脉冲差波束相位跳变构造对称波束的闭环跟踪算法。该方法有效改善了跟踪波束的角度分辨能力，多径效应引起的误差得到明显改善。
採用陣列天線跟蹤低仰角目標時需要剋服多徑效應的影響。建立瞭低仰角環境下的二徑模型，在此基礎上研究瞭對稱波束消除多徑效應的原理和約束條件，提齣瞭一種利用相鄰脈遲差波束相位跳變構造對稱波束的閉環跟蹤算法。該方法有效改善瞭跟蹤波束的角度分辨能力，多徑效應引起的誤差得到明顯改善。
채용진렬천선근종저앙각목표시수요극복다경효응적영향。건립료저앙각배경하적이경모형，재차기출상연구료대칭파속소제다경효응적원리화약속조건，제출료일충이용상린맥충차파속상위도변구조대칭파속적폐배근종산법。해방법유효개선료근종파속적각도분변능력，다경효응인기적오차득도명현개선。
To track the low elevation targetsusing array antenna,we have to mitigate the multipath effect.Based on the two-path multipath propagation models,the principle and constraint condition of symmetric beam mitigating multipath effect is studied,and a closed-loop tracking algorithm by improved symmetric beam constructed by difference beam phase toggling in two pulse periods is devel-oped.Results of simulation indicate that the proposed method can improve the angle resolution of the beam and the multipath error is im-proved obviously.
