The main factor for ranging distance is high precision time delay.
时延测量精度是制约距离测量精度的主要因素。
The elevation of the country is 60 m to 8848 m, all within a distance of 150 km with climatic condition ranging from sub tropical to arctic.
国家的海拔高度从60米到8848米，在仅150公里的范围内，气候条件从亚热带到寒带的变化。
The experiment result indicated that the system improved the ranging precision, at the same time got more accurate estimation of the distance.
实验结果表明，系统提高了整体测距精度，得到了被测距离更加准确的估计。
The unambiguous distance of tone ranging system is limited by the lowest frequency of tone.
侧音测距系统的最大无模糊距离受到侧音信号最低频率的限制。
Based on the safety distance model, the software and hardware of the main control unit of sub-system and radar ranging of sub-system is designed, the key technologies is solved.
在安全距离的基础上，对主控单元子系统和雷达测距子系统进行了软、硬件设计，解决了系统功能所需要的关键技术。
The experiment result indicates that the system can improve the ranging precision and at the same time allows a more accurate estimation of the distance.
实验结果表明，系统提高了整体测距精度，得到了被测距离更加准确的估计。
The system of passive ranging SONAR makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance.
被动测距声纳系统是利用换能器基阵接收的目标辐射（噪声）信号来估计目标距离。
Compared with other transportations such as air and road transports, railway's own characteristics maintain its advantages in the aspect of transporting distance ranging from 400 to 800 km.
与民航、公路等其他运输方式相比，铁路的特点决定了它大约在400公里- 800公里的运距上具有优势。
An ultrasonic ranging system is designed for creeping robot to avoid obstacle, which measures the distance by time-of-flight.
介绍了一种能用于爬行机器人避障的超声测距系统，通过渡越时间法测距。
This paper describes the method of super-distance precision tracking, ranging and measurement realized by high-speed DSP.
叙述了采用高速数字信号处理器(dsp)实现超远程测距跟踪测量的方法。
In this paper, research is based on the principle of high-precision ultrasonic ranging system, designed a high-precision and short distance measure system.
基于此，本文研究和设计了一种近距离高精度超声波测距系统。
The experiment results indicate that the algorithm improves ranging precision and the estimation of distance measurement is more precise than that of weighted average method.
实验结果表明，该方法提高了整体测距精度，得到了被测距离更加准确的估计。
Front-line and distance ranging from a uniform line array for the main study, in ideal conditions, respectively, conducted a study of four algorithms, and draw the corresponding conclusions.
以均匀线阵和不等间距线阵为主要研究对象，在理想的条件下，分别对四类算法进行了研究，并得出了相应的结论。
As the PN-code high performance of long period and the coherence, the very long distance and high precision ranging can be reached at the same time. Multi-target TT&C can be reached by CDMA of PN.
由于伪随机码固有的测距能力——其长周期和互相关特性，使得在测距距离和精度方面可以同时提高，采用码分多址技术可以实现对多个目标同时进行测控。
We cast these ranging measurements as a set of distance constraints, thus forming an over-determined system of equations suitable for non-linear least squares optimization.
我们将这些距离测量看作距离限制集，从而构成一个超定的系统方程，适用于最优非线性最小二乘。
The results show that the target shape can affect the ranging performance evidently relatively near, but it can be ignored in far distance.
结果表明，目标形状在较近距离情况下对测距机的接收功率和信噪比有显著影响，而在较远距离时，其影响可忽略。
A high accuracy ultrasonic distance measurement system is presented. based on the combination of both hardware and software controlling on the basis of the traditional ultrasonic ranging.
在传统超声波测距基础上，结合硬件和软件两方面的控制，提出一种高精度超声波测距系统。
Then this board can provide distance information for bistatic laser radar targeting system. This thesis is devoted to the research on the correlation theory of lidar and the methods of laser ranging.
本文研究了激光雷达相关理论及激光测距方法，基于脉冲激光测距法，给出了一种结构简单，可同时处理多路回波信号的测距电路。
Then this board can provide distance information for bistatic laser radar targeting system. This thesis is devoted to the research on the correlation theory of lidar and the methods of laser ranging.
本文研究了激光雷达相关理论及激光测距方法，基于脉冲激光测距法，给出了一种结构简单，可同时处理多路回波信号的测距电路。
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