导弹电子系统的一般功用是测量导弹本身的坐标，接收和变换遥控制导指令，测量目标相对于导弹的坐标和运动参数，按一定的导引规律形成能够修正导弹飞行的控制指令，形成引爆导弹战斗部的单次引爆指令。导弹电子系统还广泛用于导弹的测控、遥测、目标探测和数据传输等方面。
例如，盖茨说最近他希望把更多的精力放在新的远程核弹和为海军升级电子系统让来袭导弹脱离轨道。
For example, Gates said recently he wants to spend more on a new long-range nuclear bomber and updated electronics gear for the Navy that could throw an incoming missile off course.
掌管美国海军舰艇准备工作的Philip Cullom准将说，当完全用作导弹防御时，一些船已经将其40%的能量用于电子系统。
When fully dedicated to missile defence, some ships already devote 40% of their power to electrical systems, says Rear-Admiral Philip Cullom, in charge of the navy's fleet readiness.
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