| 1. | All digital frequency offset tracking loop in ofdm systems
系统中的全数字频偏跟踪环 |
| 2. | Automatic tracking loop
自动跟踪系统 |
| 3. | Carrier tracking loop
载波跟踪回路 |
| 4. | To fulfill the dynamic requirements of the system , double loops control system with velocity stabilization loop and tracking loop is applied
为了实现系统的动态指标要求，确定采用含有速率稳定环和跟踪环的双回路控制系统。 |
| 5. | The parallel scheme based on sliding correlation method is proposed in the simulation of acquisition . baseband fully time delay - locked pn code tracking loops are employed in tracking simulation
在对完全互补码捕获的仿真中，本文提出了基于滑动相关法的并行捕获实现方案。 |
| 6. | Most of the work is focused on frame detection , carrier and symbol timing offset estimation , and their implementation structures . tracking loops and performances of three demodulation modes are also discussed respectively
深入研究了上述三种突发调制模式全软件接收的突发信号检测，载波频率、相位、定时误差估计，同步实现结构，以及同步跟踪方法、特点和性能。 |
| 7. | The receiver must complete two tasks to demodulate the signal : synchronization of all parameters ( estimation and track ) and decision . in the explanation of synchronization algorithm , a thorough inspection is given to the timing track loop
在第一部分中，首先介绍的是gmsk的调制方法，接下来是跳频环境下的gmsk接收算法，主要包含了各种同步参数的捕获、跟踪的算法以及信号的判决方法。 |
| 8. | First , we analysize the performance of coherent and noncoherent dlls , then we give an implementation scheme of dll and a design method of carrier tracking loop . the design methods and a implemention scheme of a fir shaping filter is proposed in the fifth part
首先分析了相干和非相干延迟锁定环的性能，接着给出了一种dll跟踪环路的实现方案和一种载波跟踪环路的设计方法。第五部分介绍了一种fir成型滤波器的设计和实现方法。 |
| 9. | First , we classify the multipath mitigation techniques into four categories , and then the presentation of principles and simulation of performances are done of three widely - used techniques of multipath mitigation , which are based on the code tracking loop with the name of narrow - correlator - spacing technique 、 els ( early late slope ) technique and medll technique . from the presentation and simulation , the medll technique is selected as the multipath mitigation algorithm in signal processing ’ s scope .
本章首先对多径消除技术进行了分类,然后主要对基于码跟踪环路的三种技术-窄相关( narrowcorrelatorspacing )技术、 els ( earlylateslope )技术和medll ( multipathestimatingdelaylockloop )技术-进行原理分析和性能仿真,从中选择medll技术作为接收机信号处理阶段的多径消除算法。 |
| 10. | It is necessary that the receiver tracks the acquired signals steadily and credibly to ensure the successful demodulation process . in this thesis , an improved tracking loop design method is presented which adopts self - adaptation parameters and varied bandwidth tracking technique to adapt to the input signals , and improves the acquisition and tracking performance
接收机稳定可靠地跟踪被捕获信号保证成功解调是必要的，本文介绍一种改善的锁相环设计方法，这种方法采用自适应参数和变带宽跟踪技术来调整输入信号改善捕获和跟踪性能。 |
