双门限判决能够提高测距码检测率，降低虚警率。
Two thresholds can improve the detection rate, and reduce the false alarm rate of ranging codes.
该算法的主要应用领域为卫星定位信号和直序扩频测距信号PN码相位的精确测量。
The algorithm is applicable to precise measuring of the PN code phase of satellite positioning signals and spread-spectrum ranging signals.
本文对高级在轨系统(AOS)提供的等时性业务进行了深入的研究，讨论了利用AOS等时性业务实现伪码测距的可能方案。
In this paper, isochronous service of Advanced Orbit System (AOS) is researched, and the possible schemes for implementing pseudo-random code ranging by using isochronous service of AOS are discussed.
本文分为三个主要部分：第一部分分析了多径对扩频测距系统接收机码跟踪的影响机理。
It consists of three main parts: in the first part, we analyse the effect of multipath on code-tracking loops of receivers in Spread-Spectrum Ranging Systems.
再生复合伪码非常适合于深空测距。
Regenerative composite PN codes are appropriate for deep space ranging.
为了解决上述问题，我们研制了基于伪随机码调制的超声波测距。
In order to solve the above problems, we develop ultrasonic range-finder which is based on pseudorandom code.
根据理论分析，相关间隔是影响伪码测距的重要因素。
The theory shows that correlator space is an important factor of measure error.
码跟踪环的设计是伪码测距系统的一个关键环节，其参数的选择对环路跟踪曲线影响很大。
The design of code loop is the key point in the ranging system. And the choice of its parameter greatly affect the trace curve.
提出了多载波码分多址测控通信系统的概念。该系统不但能完成伪码精确测距，而且能进行高速数据传输。
This paper puts forward the concept of MC CDMA system, that can both measure distance accurately with PN code and transmit High speed data.
为使星载激光高度计实现高空间分辨率，提出了一种联合采用伪随机码调制光纤激光器和单光子计数的测距方法。
A method combining pseudorandom modulation of the fiber laser and single-photon counting is proposed to realize a high spatial resolution for the space-borne laser altimeter.
本文将伪随机码应用于超声波测距中，解决了超声波测距中存在的测距精度低和测量距离近的问题。
PRBS is applied in ultrasonic distance measurement in this article, which resolves some problems existing in it.
总结了测距功能的软硬件实现技术，包括传统的三角测量和视差测距技术、电脉冲测距技术、伪码扩频脉冲串测距技术。
Software and hardware implementation of ranging was sum up including triangulation & parallax measuring, pulse current ranging and pseudo random noise ranging.
使用完全正交的伪随机码代替单脉冲信号对超声信号进行调制，以提高发送信号的抗干扰能力和系统的测距精度；
The pseudorandom code instead of single impulse is used for modulation to improve the capability of anti-jamming and precision of measuring range.
使用它的长期、中期和短期的雷达系统，它能探测距离200码的对象作为你前面的车。
Using its long, medium, and short range radar systems it can detect objects as far as 200 yards in front of your vehicle.
结合实际情况对这几种方法进行分析比较，在现有技术设备条件下得到了一种比较理想的伪随机码测距方法—星上处理伪随机码测距。
Also these methods a re analyzed and compared in the factual condition and a perfect pseudo noise code ranging method is educed. That is PN code ranging with on -board processing.
分析了伪码测距不同方案间的性能差异和实现难度。
The different performance and difficulty among these methods are analyzed.
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。
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.
比较详细地讨论卫星测控系统中利用伪随机码来测距的几种方法。
The principle of detection by pseudorandom code is illustrated in this paper.
比较详细地讨论卫星测控系统中利用伪随机码来测距的几种方法。
The principle of detection by pseudorandom code is illustrated in this paper.
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