| CDMA: Frequency
Hopping |
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| n | originally
developed to foil jamming by military |
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| opponent |
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| n | idea:
divide frequency band into subbands, |
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| transmit
data in one subband at each instant, but |
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| change
frequency subband frequently |
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| n | frequency
changes pseudo-randomly to thwart |
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| attacker
(or to reduce collision likelihood with |
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| parallel
send attempt) |
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| n | sender
and receiver need to agree on sequence of |
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| frequency
changes |
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