What Is Frequency Hopping - Code Division Multiple Access (FH-CDMA)?

Frequency hopping is one of the oldest tricks in the book. It's basically how you get away with stealing someone else's lunch money while they're distracted by a game of kickball. Frequency hopping happens when you change the radio frequency of your signal so quickly that it's impossible for anyone to tell where you really are or what you're saying. In other words, it's like changing the channel on a TV set so fast that no one can tell where it is—or even if it's still on! It's a great way to hide from bullies, but it also works well for hiding from law enforcement agencies and other people who might not want you around—like cops or your parents when they're trying to find out where you are after curfew. When it comes to FH-CDMA, there's one thing that's for sure: it's not just for people who like to hop around. As when you're using FH-CDMA, you're hopping around—and your signal is hopping right along with you! That's because the FH-CDMA technique uses a specific algorithm to switch between all available frequencies based on a preplanned or random schedule. The receiver stays tuned to precisely the same center frequency as the transmitter (because they're in sync). FH-CDMA is like a little kid in a big pool. It's small, but it can swim pretty well. DS-CDMA is like an adult in the same collection—it's bigger and slower, but it knows how to float on its back and read a book while still staying dry. FH-CDMA is the best for people who want to use their devices without worrying about getting wet; DS-CDMA is better for those who want to keep their heads above water and see what's going on around them.