射频链路的干扰与抗干扰技术

　　射频链路的干扰与抗干扰技术

　　无线信号容易受到自然发生的周期性和随机现象，如背景噪声，电磁干扰，射频干扰，CME和EMP的名字。一些无线技术，如AM，很容易受到脉冲噪声，如远程照明罢工；和其他人，如FM，可以敏感的带内噪声的荧光灯。作为设计师，我们试着预期的情况下我们的设计会提供补丁，变通的情况，或其他类型的解决方案来解决这些问题。

　　然而，另一种情况是无线链路特别容易受到干扰，这就是蓄意干扰。在这里，有人故意设置一个链接的攻击，特别是针对特定的链接或家庭的链接是有效的阻止链接的通信能力。干扰可以尝试恶作剧的目的，动机，如利润，或在战争时期的军事优势。

　　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.