As frequency divided multiplex access is widely adopted in communication satellite system, strict frequency spectrum limits on modulator is mandated.
通信卫星的频分复用机制，对卫星通信系统的发送信号频谱成型提出了严格的要求。
Spread Spectrum technique is widely used in digital cell-phone mobile communication system, satellite mobile communication, inside wireless communication and future personal communication.
扩频技术在数字蜂窝移动通信系统、卫星移动通信、室内无线通信和未来的个人通信中被广泛采用。
Satellite image, one of the products from remote sensing techniques, reflects light radiance of any object at numerous ranges of electromagnetic spectrum.
人造卫星图片是遥感技术下其中一个产物，它主要是用作反映物件在不同电磁光谱范围的光线放射情况。
In order to improve the spectrum usage of the up-band of fixed satellite service(FSS), an unlicensed access scheme is presented.
为了提高卫星固定业务上行频段的频谱利用效率，提出了一种无授权接入该频段的方案。
As described before, utility graph coloring with proportional fair utility is implemented by the satellite in the spectrum allocation.
如前所述，在频谱分配中卫星执行实用工具图。
According to the limitation of the satellite orbits and spectrum resources, this paper puts forward some methods for making effective use of the satellite orbits and spectrum resources.
根据卫星轨道和频谱资源的有限性，提出了有效利用卫星轨道和频谱资源的几种方法。
After further investigating the theory of spectrum analyzer, the author proposes the application of spectrum analyzer to satellite communications.
文章从频谱分析仪的原理出发探讨了其作为测试仪器在卫星通信中的应用。
In this paper, we talk about the collection aperture's normalized arrival-of-angle fluctuation spectrum in Satellite-ground laser communication.
根据星地激光通信的实际状况，对接收孔径的归一化到达角起伏频谱进行了讨论。
After atmospheric correcting, water pixels of satellite remote sensing data of optic spectrum are mainly influenced by pollutants, soil and sand, and chlorophyll in the water.
在经大气校正后，可见光波段卫星遥感数据的水体象元主要受水中污染物、泥沙及叶绿素等的影响。
It was proposed that the project of satellite overlay communication with direct sequence spectrum spreading (DSSS).
提出一种利用DS扩频技术实现卫星重叠通信的方案。
The space particle composition detector aboard FY-1C satellite can simultaneously detect proton spectrum, electron integrated flux and heavy ion composition.
FY 1C星空间粒子成分探测器能够实现对质子能谱、电子积分通量及重离子成分的同时测量。
This article proposes one practice case for a satellite frequency spectrum monitor system.
提出了一种卫星频谱监测系统的实践案例。
The algorithm is applicable to precise measuring of the PN code phase of satellite positioning signals and spread-spectrum ranging signals.
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。
To achieve spectrum holes detection in cognitive satellite communication, six spectrum sensing methodologies are introduced and compared.
以实现卫星认知无线通信中频谱空穴探测为目的，列举并比较了目前用于频谱感知的六种算法。
The availability of low orbit satellite spread-spectrum communications is impacted by the complicated radio environment in China and Southeast Asia.
由于中国国内和东南亚地区电磁环境复杂，影响了低轨卫星扩频通信的可用性。
In this dissertation, some methods for narrowband interference suppression and impulse interference rejection in the low orbit satellite spread spectrum communication are studied.
本文针对低轨卫星扩频通信的窄带干扰和脉冲干扰抑制方法进行了研究和仿真。
It is studied that the code acquisition technology of direct sequence spread spectrum system in LEO satellite communication.
研究了用于低轨卫星通信的直接序列扩频系统的码捕获技术。
When designing a special type small satellite (STSS) communication system with spread-spectrum technology, the fading and the interference must be considered carefully.
对于特种小卫星扩频通信系统，衰落及干扰状况是系统设计时必须考虑的重要方面。
International Telecommunications Union (ITU) rules state that after submitting a proposal to use a frequency, a satellite must be in orbit and using that part of the spectrum within seven years.
国际的电传视讯联盟(itu)在一份使用频率的提议确定之后说，一座在轨道中的人造卫星一定在七年内使用那个部份的频率。
Based on the temporal covariance of logarithmic amplitude, analytical expression was obtained for aperture receiving power spectrum of atmospheric scintillation of satellite-to-ground downlink.
基于孔径接收的对数振幅时间相关函数，结合星地激光下行链路的实际情况，推导了适用于星地下行孔径接收的闪烁频谱表达式。
Infrared radiometric calibration is of critical importance for information quantification of satellite remote sensing of environment at infrared spectrum.
红外辐射定标是红外遥感信息定量化的关键技术之一。
Because of the complexity in satellite remote sensing imaging system, some uncertainties or mixed spectrum information are contained in the data.
由于遥感成像过程的复杂性，遥感数据中包含了一定程度的不确定性因素。
He headed a group of engineers, whose duty was to develop frequency synthesizers and local generators for frequency hopping spread spectrum and satellite systems.
他还带领一个工程师团队，负责研究用于跳频扩频以及卫星系统的频率合成器和局部发生器。
He headed a group of engineers, whose duty was to develop frequency synthesizers and local generators for frequency hopping spread spectrum and satellite systems.
他还带领一个工程师团队，负责研究用于跳频扩频以及卫星系统的频率合成器和局部发生器。
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