Based on MATLAB, the primary concepts of the spread spectrum are simulated. The system design and interface technology of a spread spectrum radio device is simply discussed.
基于MATLAB，对扩频通信技术有关概念进行了仿真分析，并简要讨论了点对点扩频电台的系统设计和接口技术。
Presented in this paper is a direct sequence spread spectrum radio based on virtual technique in which direct sequence spread spectrum, software radio and virtual technique are combined.
文中提出的虚拟式直接序列扩频通信电台将直接序列扩频通信、软件无线电和虚拟技术相结合。
Space on the radio spectrum is the most valuable raw material in mobile telecoms, India's most dynamic industry.
在印度最有活力的实业——移动电信中无线电频谱的空间是最有价值的原材料。
The cheapest way to increase capacity is to add more spectrum or to move a network to a lower frequency, which allows radio waves to penetrate walls more easily.
提高带宽容量最便宜的方法是增加更多频谱或是某个网络降低到更低的频率以使无线电波更容易穿透墙壁。
Researchers previously introduced this "smart" approach in cognitive radio designs, which sought to improve throughput by capturing the best available spectrum to meet user communication requirements.
先前研究人员将该“灵敏”方法引入认知无线电设计中，该设计通过捕获最佳可用频谱提高吞吐量以满足用户通信需求。
His discovery of the electromagnetic spectrum led to the development of television, radio, microwaves, as well as aiding in the development of radio and infrared telescopes.
他发现的电磁特性最终导致电视、广播、微波炉的发明，并且也对无线电和红外望远镜的发明起到了重要作用。
Similarly, some sensors already make more efficient use of another scarce resource: radio spectrum.
与之相似的是，某些传感器已在更高效地利用另一种稀有来源——射电谱。
The radio spectrum can carry only so many stations, and a coaxial cable so many TV channels.
一定频谱范围内的无线电波只能搭载有限的广播频道；同轴电缆只能传 输有限的电视频道。
Similarly, India is about to auction off FM radio spectrum and the competition is expected to be fiercest for the big cities, says n.
萨布拉马尼说，与此类似，印度即将拍卖FM无线电频段，而据预计针对大城市的竞拍将会是最激烈的。
They owned the radio spectrum, built the networks, maintained the relationships with customers-and then grabbed most of the spoils.
他们(运营商)拥有无线电频谱，架设了网络，维持用户的联系——当然赚得最多。
One reason this is hard is that radio telescopes must chop the spectrum into fine portions to study it, like tuning into a signal on a car radio.
研究工作进展困难的一个原因是，正如汽车收音机的调频一般，射电望远镜必须把光谱按照波段分成易于研究的片段。
They suggest that any alien civilisation worth its salt would alight not on the photons of the electromagnetic spectrum-whether optical or radio-frequency-to send messages to other solar systems.
他们指出，任何有头脑的外星文明都不会发射电磁波谱中的光子——无论是可见光波段还是射频波段——向另一个太阳系传送信息。
Radio has been cramming ever more information into the transmission, using techniques such as spreading it across the spectrum, dividing it up into portions and using "smart" antennae.
通过使用诸如跨频段传播，分割成块和“智能”天线技术使传输中的无线电波填充更多的信息。
LIKE a deity, radio spectrum is invisible, omnipresent and commands awesome power.
无线电波像神明一样，无法看到而又无处不在，并拥有让世人敬畏的力量。
The system carries out the statistics and analysis to spectrum occupy in the radio monitoring.
系统完成无线电监测频谱占用度数据的统计和分析。
The spectrum allocation technology, which is one of the key technologies of cognitive radio, the research emphasis is how to manage the spectrum resource effectively.
认知无线电的频谱分配技术研究的是如何对检测到的空闲频谱资源进行有效的管理，是认知无线电系统的一项关键技术。
Mr Bajaj reckons that India now has about 40m 3g devices in circulation, even before the extra radio spectrum has been made available.
Bajaj先生估计目前印度有大约4000万3G设备在流通，即使在额外的频谱已经提供以前。
Another bonus: Once analog broadcasting ends, the prime radio spectrum it now USES will be auctioned off.
另外一大好处是：一旦类比式播放系统停用，它目前所占用的主要无线频谱就会被拍卖出去。
UWB technology is a new exploration of the use of radio spectrum resource and it inaugurate a new field of time domain application of electromagnetic wave.
利用UWB技术是对无线频谱资源的利用进行的新的探索，开辟时域电磁波应用的新领域。
Unfortunately, some parts of the radio spectrum are full of signals created by Earthlings, rather than aliens.
不幸的是，来自地球居民而不是外星人的信号挤满了射频频谱的一部分。
Cognitive radio; Spectrum sensing; Entropy; Signal correlation; Spectrum consistency.
认知无线电；频谱感知；信息熵；信号相关性；频谱一致性。
A more efficient radio resource allocation and management scheme should be proved to transmit with higher spectrum and power efficiency and higher system performance.
需要研究更加有效的无线资源分配及管理策略，以便在有限的带宽上达到更高频谱效率、更高的发射功率利用率以及更好的系统性能。
The push for 3g in Japan is especially pronounced. Analysts say that's because Japan has so many nonstandard proprietary systems and radio spectrum is being used up.
在日本，专门宣布了推进3g，分析人士说，这是因为日本有如此多的非标准的专有系统以及无线电频谱正在被用完。
The scatter spectrum of radio waves by a dusty plasma has been studed with the dynamic factor which was derived from the kinetic theory.
用等离子体动力论导出的动力形状因子研究尘埃等离子体的散射功率谱。
The automatic recognition and parameter estimation techniques of communication signals can be utilized in the authentication and spectrum management for radio signals.
通信信号的自动识别与参数估计技术可用于有关职能部门对无线电信号进行认证、实施频谱监管。
Spectrum sensing is one of the key technologies in cognitive radio, and cooperative spectrum sensing can improve the spectrum sensing performance.
频谱感知是认知无线电系统的关键技术之一，协作频谱感知能够提高频谱感知性能。
But there is only a limited amount of radio spectrum available.
但可用于通信的无线电频段是有限的。
But there is only a limited amount of radio spectrum available.
但可用于通信的无线电频段是有限的。
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