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document updated 11 years ago, on Jan 1, 2013

How does the military try to work around jamming attempts, particularly related to data communcations?

(all links are Wikipedia pages)

jamming (ECM)

counter-jamming (ECCM)

strategy: stay with RF, but modify the signal to reduce the effects of jamming

use various types of RF agility, concentrate the signal in a specific part of the spectrum to increase SNR, and constantly move the concentrated area around
use the same techniques as described in the agility section, but use several channels simultaneously — AKA diversity combining [2]
- spread spectrum and ultra-wideband
point-to-point communication
- microwave communication
- sidelobe blanking

strategy: use non-RF methods to communicate, particularly point-to-point methods

strategy: destroy the jammer

ARM (anti-radiation missile)

generally

radar jamming countermeasures

layer 1 protocols designed with ECCM in mind

generally