Network channel is base on frequency hopping and spectrum spread radio stations.

网络信道基于跳频和扩频超短波电台。

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But a spectrum spread system's interference immunity depends on spectrum spread gain.

传统的扩频抗干扰方式在面对窄带干扰时效果良好。

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Therefore, spectrum spread systems lose efficiency when dealing with wide band interference.

因此，扩频系统在面对宽带非平稳干扰时，抑制效果十分有限。

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Main.net uses a related technology called direct sequence spread spectrum, or DSSS, to send its signals down the power line.

FORBES: Technology

As you have said, in 1940 Hedy Lamar (Obituary, January 29th) and a film-score composer, George Antheil, developed the technology, then called spread spectrum.

ECONOMIST: Letters | The

Spread spectrum was first used by the allies in the Pacific campaigns of the second world war, where it foiled Japanese attempts to jam radio-controlled torpedoes.

ECONOMIST: Letters