radio-wave spectrum

Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum.

扩频技术是在无线电电磁频谱中无条例管制的部分中竞争.

Using the dressed test particle approach to deduce the scattering power spectrum of radio waves by a quasi-equilibrium ionized gas in the presence of an external magnetic field

用试验粒子法求有外磁场影响时准平衡态下的等离子体气体的散射功率谱

Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space...

大量的能量，从 X 光直到无线电电波，都正被泄露到太空中去。

The Solar Radio Patrol Network of USAF and the Examination of Prediction Accuracy of the U-Shaped Radio Spectrum for Cycle 21

USAF太阳射电全球巡视网及其第21太阳活动周U-型谱预报精度的检验

Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space.

大量的能量，从X光直到无线电电波，都正被泄露到太空中去。

Rational usage of limited radio spectrum resources is the focus of attention in order to improve spectrum utilization. System sharing can effectively improve the frequency efficiency, but in order to ensure the operation, it is necessary for two systems to sharing study.

系统共用可以有效的提高无线电频谱的使用效率，但是为了保证共存的系统都能正常工作，首要的研究工作是对系统间进行干扰分析研究。

Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space

大量的能量，从X光直到无线电电波，都正被泄露到太空中去。

Aiming at improving the spectrum utilization efficiency via employing the cognitive radio technology into practical communication, the communication system in this paper can make better use of the spectrum resources with some tolerable loss of communication efficiency.

本系统凸显了认知无线电理论运用于实际通信中对频谱利用率的提升，使系统内的用户能够在损失少量通信实时性的情况下高效地利用频谱资源。

the electromagnetic/radio/sound spectrum

电磁波谱；射频频谱；声谱

By analysis of the intermediate frequency signals which through eight antennae and receiver channels, eight channels radio spatial spectrum direction finding system can reach the purpose of finding radio direction.

八通道无线电空间谱测向系统通过分析经过八路天线和接收机通道以后的中频信号达到确定无线电信号方向的目的。