An Accurate and Fast Ray-tracing Technique for Radar Ranging at Low Elevation Angles

Then, it gave a numerical model which can simulation target structure influence the laser radar ranging characteristics.

此外，将激光雷达回波波形仿真模型和课题组已有的激光雷达测距过程仿真模型相结合，构成了能够仿真目标结构对激光雷达测距特性影响的数值模型。

A Novel Method of Digital Signal Processing in FMCW Radar Ranging System

FMCW雷达液面测量系统中的信号处理方法

Design of Radar Ranging Based on FPGA Technology

基于FPGA的雷达测距设计

Simulation and Analysis of CW Radar Ranging for Time Error

连续波雷达测距时差仿真分析

Sonic-Density-Neutron logging suite borehole televisor sound operation navigation and ranging

声波-密度-中子测井系列

The anti-artillery reconnaissance is an important duty of artillery reconnaissance, the artillery locating radar and sound ranging are main equipments of anti-artillery reconnaissance.

反炮兵侦察是炮兵侦察的一项重要任务，声测和雷达是反炮兵侦察的主要装备。

The Operational Effectiveness Analysis of the Artillery Locating Radar and Sound Ranging Networking System based on SEA

基于SEA的炮兵声测和雷达组网的作战效能分析

The Deep Space 3 is a proposed mission by NASA within the New Millennium Program. This paper primarily studies the relative state parameters autonomous determination of three satellites formation of the Deep Space 3 using inter-satellite relative measurements of like-GPS carrier phase and a ranging code onboard.

以NASA新千年计划中的深空计划3为背景，使用星载类GPS的伪距和载波观测数据，研究利用编队卫星间相对测量，高精度自主确定三星编队星座相对状态的有关问题；

In order to determine relative positions between satellites and the attitudes of satellite of formation constellation, like-GPS carrier phase was added in based on former study of states determination combining with carrier phase differential GPS ( CDGPS) and like-GPS ranging code.

为了确定编队星座的星间相对位置和卫星姿态，在原有联合GPS差分和类GPS伪距进行状态确定的研究基础上，进一步加入了类GPS载波差分信息。

Currently most satellite navigation systems utilize the spread spectrum communication technology to transmit navigation information, and the commonly-used PRN ranging code is the balanced Gold code.

目前的卫星导航定位系统大多采用扩频通信技术来传输导航信息，常用的伪随机码是平衡Gold码。

A design of spread spectrum and ranging code in radio measurement and its control system are given in the paper.

本文给出了无线电测控系统中扩频和测距编码的设计方法。

A Study on the PRN Ranging Code of Satellite Navigation Systems

卫星导航定位系统中伪随机码的研究

Secondly, it introduces the frequency selection, EMC ( Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal ( L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman.

其次，介绍了其信号的频段选择、电磁兼容性及其调制和产生的基本原理，包括L5测距码、卷积码、QPSK调制以及Neuman。

According to actual needs, the thesis identifies specific parameters of code system and select JPL rapid capture based on m-m composite sequences as ranging code signals of the system.

根据实际需要论证了码制的具体参数，选择了基于m-m复合序列生成的JPL快捕码作为系统的测距码信号。

As an important feature, the characteristics of echo stretching affects SNR of received laser echo signal and ranging accuracy.

脉冲展宽特性是激光回波的重要特性，其影响到回波接收信噪比和测距精度。

Simluation results show that the maximum entropy spectral estimation and LMS adaptive algorithm can extract echo signal of laser ranging system effectively from background noises.

仿真分析表明，最大熵谱估计和LMS自适应算法相结合可以有效地从背景噪声中提取有用的激光反射回波信号。

Maximum entropy spectral estimation and LMS adaptive algorithm were proposed to extract the reflection echo signal of laser ranging system.

提出了最大熵谱估计和LMS自适应算法提取激光测距系统的反射回波信号。

Combined echo ranging echo sounding

组合回声测距与测深统一的回声测距与测深

Echo ranging of the South Sea Lion

南海狮的回声定位

CERES ( Combined Echo Ranging Echo Sounding) acoustic pulse echo system

声脉冲回声测距系统