一种星载应答机用分数分频频率综合器设计

发布时间：2018-03-13 20:30

  本文选题：分数分频　切入点：高可靠　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：在卫星测控通信应用中,频率综合器常作为星载测控应答机射频收发机的射频本振。传统的整数分频频率综合器频率分辨率与接收频点精度要求之间存在差距,影响了射频接收机对接收本振频点的适应性。设计一种具有一定空间环境适应性,噪声及杂散性能较好的分数分频频率综合器对解决当前星载测控应答机频点适应性,提高其设计稳定和调试效率具有重要意义。本文介绍了频率综合器基本原理、空间环境适应性设计基本原则和分数分频锁相环的基本理论;从锁相式频率综合器噪声和杂散抑制方法及Delta-Sigma调制器噪声整形原理入手,设计出一种基于MASH结构DSM调制技术的分数分频频率综合器。本文主要研究了频率综合器空间环境适应性设计及噪声抑制方法、MASH结构的分数杂散抑制特性,并进行了相关理论推导和仿真验证。本文最后详细介绍了频率综合器的硬件设计和全数字MASH1-1-1结构的软件设计过程,并对硬件实现及测试情况进行了介绍。本课题最终实现的频率综合器相位噪声低至-83dBc/Hz@10kHz、分数杂散抑制约为-30dBc、频率分辨率达到100Hz,硬件工作温度范围可达-40℃~+85℃,抗辐射总剂量达100 krad(Si),并具备一定的抗SEU能力,课题设计满足了预期的指标要求,且易于向卫星工程应用转化,具有较好的应用前景。
[Abstract]:In the application of satellite TT & C communication, the frequency synthesizer is often used as the RF local oscillator of the radio frequency transceiver of the spaceborne TT & C transponder. There is a gap between the frequency resolution of the traditional integer divider frequency synthesizer and the precision requirement of the receiving frequency point. The adaptability of RF receiver to receiving local oscillator frequency point is affected. A fractional divider frequency synthesizer with certain space environment adaptability, good noise and spurious performance is designed to solve the frequency point adaptability of spaceborne TT & C transponder. It is of great significance to improve the design stability and debugging efficiency. This paper introduces the basic principle of frequency synthesizer, the basic principle of space environment adaptability design and the basic theory of fractional frequency division phase-locked loop. The noise and spurious suppression method of phase-locked frequency synthesizer and the noise shaping principle of Delta-Sigma modulator are introduced. A fractional divider frequency synthesizer based on MASH structure DSM modulation technology is designed. In this paper, the space environment adaptability design of frequency synthesizer and the noise suppression method are studied. Finally, the hardware design of the frequency synthesizer and the software design process of the full digital MASH1-1-1 structure are introduced in detail. Finally, the phase noise of the frequency synthesizer is as low as -83 dBc / Hz @ 10kHz, the fractional spurious suppression is about -30dBc, the frequency resolution is 100 Hz, and the working temperature range of hardware is -40 鈩，

本文编号：1608053