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。

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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。

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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。

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Last month Dish won a ruling to convert some satellite spectrum to be used as cell phone spectrum.

FORBES: Dish To Battle Sprint For Clearwire's Pot Of Gold

According to people involved in the transaction, the unrealized value of selling more satellite spectrum has private equity players salivating.

FORBES: Why Private Equity is Chasing the next Satellite Dream

The smart money is still analyzing if Inmarsat could sell more of its valuable satellite spectrum in other countries down the road.

FORBES: Why did Phil Falcone really sell-off half his Inmarsat stake?