接收机的非线性分析  

Nonlinear Analysis of Receiver

作　　者：胡向峰[1] 张艳花[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051

出　　处：《信息与电子工程》2008年第6期440-443,共4页information and electronic engineering

摘　　要：接收机的非线性是影响接收系统性能的一个重要因素,对其进行全面分析和合理测试是研究并提高接收机线性度的一个重要前提。通过严格的理论分析和推导,论述了以超外差结构为代表的一般接收机系统非线性失真产生的原因。进而对作为衡量接收机线性度重要指标的三阶互调、三阶截点进行了深入探讨,并提出了三阶截点的合理测试方法。The nonlinearity of receiver is an important factor influencing the performance receiving system. The comprehensive analysis and reasonable measurement is an important prerequisite to research and improve the linearity of the receiver. The reason of nonlinear distortion of the common receiver is analyzed, which is represented with super heterodyne receiver. Furthermore, the third-order interception and the third-order interception points which are the important indices of linear degree in receiver are thoroughly discussed, and several rational measurement methods for third-order interception point are put forward.

关 键 词：非线性 接收机 三阶互调 三阶截点 

分 类 号：TN851[电子电信—信息与通信工程]