Randomizer

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{math, number, function}
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In telecommunication, a randomizer has the following meanings:

Contents

Scrambling

Scramblers are primarily used for two reasons:

Scramblers are essential components of physical layer system standards besides interleaved coding and modulation. They are usually defined based on linear feedback shift registers (LFSRs) due to their good statistical properties and ease of implementation in hardware.

It is common for physical layer standards bodies to refer to lower-layer (physical layer and link layer) encryption as scrambling as well.[1][2] This may well be because (traditional) mechanisms employed are based on feedback shift registers as well. Some standards for digital television, such as DVB-CA and MPE, refer to encryption at the link layer as scrambling.

See also

Notes

References

 This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).

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