摘要: |
针对目前全球卫星导航系统(Global Navigation Satellite System,GNSS)普遍存在的抗干扰能力弱的突出问题,研制了一款七通道抗干扰GNSS接收机,通过利用多模组合导航抗干扰技术及级联/组合空域、时域与频域等多重抗干扰技术来应对复杂电磁环境应用的需求。重点介绍了抗干扰GNSS接收机射频前端的设计方法,通过数理推导给出了产品设计需求与整个射频前端及各级电路的设计指标之间的定量关系,从而提供了在已知设计需求的条件下进行产品正向设计的设计准则与方法。通过产品投产和测试,测试结果与设计需求吻合,从而验证了该套设计方法有效可行,同时该套准则与方法具有很强的普适性。与同类产品比较以及整机试验表明,该产品的抗干扰能力(主要体现为最大可承受干信比)较同类产品提升20 dB以上,证明产品具有一定的先进性。 |
关键词: 卫星导航接收机 抗干扰 射频前端 七通道 带外抑制 |
DOI: |
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基金项目:国防科技创新特区资助(18-H863-01-ZT-002-057-01) |
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Design of a seven-channel anti-jamming RF front-end for GNSS receiver |
ZHOU Jianzheng,LI Li,HOU Yang,PEI Shanhui,ZENG Minhui |
(Anhui Province Key Laboratory of Microsystem,The 43rd Research Institute of
China Electronics Technology Group Corporation,Hefei 230088,China) |
Abstract: |
In order to solve the ubiquitous outstanding problem of weak anti-jamming ability of global navigation satellite system(GNSS),a seven-channel anti-jamming GNSS receiver is developed.The multi-mode integrated navigation anti-jamming technology and cascade/integrated airspace,time domain and frequency domain multiple anti-jamming technologies are used to meet the requirements of complex electromagnetic environment applications.This paper focuses on the design method of RF front-end for anti-jamming GNSS receiver.Through mathematical derivation,the quantitative relationship between product design requirements and the design indexes of the whole RF front-end and all cascade circuits is given.Thus,the design criteria and methods for forward design of products with known design requirements are provided.Finally,through production and test of the product,the test results are consistent with the design requirements,which verifies the effectiveness and feasibility of the design methods.This set of design criteria and methods have strong universality.Comparison with similar products and whole machine experiment demonstrate that the product's anti-interference ability which is mainly reflected in the maximum acceptable jamming to signal ratio,is more than 20 dB higher than that of similar products,and the product is advanced. |
Key words: GNSS receiver anti-jamming RF front-end seven channel out of band suppression |