射頻鏈路的干擾與抗干擾技術(shù)

　　無線信號容易受到自然發(fā)生的周期性和隨機(jī)現(xiàn)象，如背景噪聲，電磁干擾，射頻干擾，CME和EMP的名字。一些無線技術(shù)，如AM，很容易受到脈沖噪聲，如遠(yuǎn)程照明罷工；和其他人，如FM，可以敏感的帶內(nèi)噪聲的熒光燈。作為設(shè)計師，我們試著預(yù)期的情況下我們的設(shè)計會提供補丁，變通的情況，或其他類型的解決方案來解決這些問題。

　　然而，另一種情況是無線鏈路特別容易受到干擾，這就是蓄意干擾。在這里，有人故意設(shè)置一個鏈接的攻擊，特別是針對特定的鏈接或家庭的鏈接是有效的阻止鏈接的通信能力。干擾可以嘗試惡作劇的目的，動機(jī)，如利潤，或在戰(zhàn)爭時期的軍事優(yōu)勢。

　　Kids with little boxes or kits can make and use jammers to annoy parents， schools， and commit similar forms of mayhem. Corporations can use jammers to interfere with a competitor’s operations， slow down or crash a company’s network， or prevent vital data from making it to its destination. Financial institutions can jam communications to provide even a millisecond’s advantage in completing a transaction that can be leveraged for gain. Military jamming can make drones crash， interfere with tactical communications， and even jam or change GPS signals to confuse the enemy.

　　This article looks at jamming techniques and technologies as well as anti-jamming measures and devices that allow wireless communications to continue even while under targeted attack. All parts， tutorials， reference designs， and development kits mentioned can be found online at Digi-Key’s website.