舰船电子工程
艦船電子工程
함선전자공정
SHIP ELECTRONIC ENGINEERING
2014年
11期
109-111,142
,共4页
全向天线%希尔伯特滤波%Quartus Ⅱ%宽带移向
全嚮天線%希爾伯特濾波%Quartus Ⅱ%寬帶移嚮
전향천선%희이백특려파%Quartus Ⅱ%관대이향
omnidirectional antenna%Hilbert filter%Quartus Ⅱ%phase shift
为了解决磁天线接收信号存在盲区的问题,提出一种可以用希尔伯特滤波器来完成的宽带甚低频水下通信全向接收新方法,完成数字化全向接收的理论推导。在未知信号载波频率的条件下,可实现对信号进行宽带移向,从而完成磁性天线数字化全向合成。仿真结果表明,设计方案合理可行,可用于宽频带信号全向天线的数字化合成。
為瞭解決磁天線接收信號存在盲區的問題,提齣一種可以用希爾伯特濾波器來完成的寬帶甚低頻水下通信全嚮接收新方法,完成數字化全嚮接收的理論推導。在未知信號載波頻率的條件下,可實現對信號進行寬帶移嚮,從而完成磁性天線數字化全嚮閤成。倣真結果錶明,設計方案閤理可行,可用于寬頻帶信號全嚮天線的數字化閤成。
위료해결자천선접수신호존재맹구적문제,제출일충가이용희이백특려파기래완성적관대심저빈수하통신전향접수신방법,완성수자화전향접수적이론추도。재미지신호재파빈솔적조건하,가실현대신호진행관대이향,종이완성자성천선수자화전향합성。방진결과표명,설계방안합리가행,가용우관빈대신호전향천선적수자화합성。
According to the design of Matlab's FDAtool analysis software ,a Hilbert filter for 90 degrees phrase shift on the signal is designed .Combine it with another delay signal ,so as to achieve the purpose of omindirectional receiving . VHDL language generated by signal compiler in the Quartus Ⅱ environment is compiled ,the project is established ,down‐load to the hardware ,and the hardware output waveform is observed by signal tap Ⅱ Logic analyzer .The simulation results show that the design scheme is feasible ,which can be used for digital synthetic omnidirectional antenna .