These requirements govern the allowed spectrum of a transmission and vary according to the bandwidth of the channel and the frequency of transmission.

这些需求根据信道带宽和发射频率改变，控制允许发送的频谱。

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In 2010 an auction of new spectrum allowed his mobile competitors to offer 3G mobile-data services.

ECONOMIST: Carlos Slim

When the FCC last conducted similar auctions in 2006, it allowed cable companies to bid for wireless spectrum as the regulatory agency wanted to increase competition in the wireless industry.

FORBES: Washington Says Not So Fast To Verizon Spectrum Grab

In the past, the FCC has allowed Deutsche Telekom to ownU.S.spectrum.

FORBES: Will The U.S.Allow Foreign Ownership Of A Giant Swath Of Our Broadband Spectrum?