RF对消系统中误差检测模块与数字信号处理研究

发布时间：2019-04-10 21:03

【摘要】：射频对消系统主要是为了解决单天线收发组件隔离度不高的问题而提出的。误差检测和数字信号处理(DSP)模块又是该系统中重要的组成部分。模块主要是完成泄露信号信息的提取工作,就是把从发射通道泄露到接收通道中的剩余误差信号的信息通过误差检测模块提取出来,并把提取出的信号进行数字信号处理,从而得到两路控制信号。控制信号会通过控制IQ适量调制器来调节馈通信号的幅度和相位来实现与泄露信号的对消工作。其中误差检测模块采用二次变频方案实现,数字信号处理模块采用模数数模转换电路与DSP开发板来实现。误差检测模块采用混合集成方式来实现,由于工作频段在毫米波波段中,以往研究较少,对于以后该波段的毫米波电路的设计以及应用有重大帮助。首先,在第一章中对模块的功能与作用进行了简单的介绍,对国内外文献中相关工作的设计和实现进行研究。第二章主要对模块的原理进行详细的阐述,通过对电路的分析来确定实施的具体方案。在第三章中对误差检测模块中所需要应用的无源电路进行仿真与分析,通过对比各种结构的优劣来决定适用于该模块的具体结构。第四章则是误差检测模块有源电路的设计,对模块所需有源器件进行理论研究和分析,并通过所需要求来选定应用在模块中的MMIC芯片。第五章对数字信号处理模块进行整体结构的设计,通过模数数模电路的设计来实现DSP开发板的输入输出工作,对于适用于数字信号处理的算法进行研究与仿真工作。第六章是对模块整体方案的实现与测试进行介绍,包括射频电路、腔体和PCB板的加工,以及后续装配的要求与步骤。第七章对全文进行了总结工作,对于未来的进一步工作提供了方向。
[Abstract]:RF cancellation system is proposed to solve the problem of low isolation of single antenna transceiver components. Error detection and digital signal processing (DSP) module is also an important part of the system. The module mainly completes the extraction of the leaked signal information, which is to extract the information of the residual error signal from the transmitting channel to the receiving channel through the error detection module, and to carry out the digital signal processing of the extracted signal. Thus, two control signals are obtained. The control signal can adjust the amplitude and phase of the feed-through signal by controlling the proper amount of IQ modulator to cancel the leak signal. The error detection module is realized by the secondary frequency conversion scheme, and the digital signal processing module is realized by the analog-to-digital conversion circuit and the DSP development board. The error detection module is realized by means of hybrid integration. As the working band is in the millimeter wave band, there is little research in the past, which is of great help to the design and application of the millimeter wave circuit in this band in the future. Firstly, in the first chapter, the function and function of the module are simply introduced, and the design and implementation of the related work in the domestic and foreign literature are studied. The second chapter describes the principle of the module in detail, through the analysis of the circuit to determine the implementation of the specific scheme. In the third chapter, the passive circuit needed to be used in the error detection module is simulated and analyzed, and the specific structure of the module is determined by comparing the merits and demerits of various structures. The fourth chapter is about the design of the active circuit of the error detection module. The theoretical research and analysis of the active components of the module are carried out, and the MMIC chip used in the module is selected through the required requirements. In the fifth chapter, the whole structure of the digital signal processing module is designed, and the input and output of the DSP development board is realized by the design of the analog-digital-analog circuit, and the algorithm suitable for the digital signal processing is studied and simulated. The sixth chapter introduces the implementation and testing of the whole module, including RF circuit, cavity and PCB board machining, as well as the requirements and steps of subsequent assembly. The seventh chapter summarizes the full text and provides the direction for further work in the future.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.7

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