MOREHedy Lamarr’s invention of frequency hopping was a groundbreaking contribution to the field of wireless communications. Frequency hopping is a technique that allows a signal to switch between different frequencies in a random or predetermined pattern, making it harder for an enemy to jam or intercept the signal. This technique is widely used in modern technologies such as WiFi, Bluetooth, and GPS, which rely on wireless transmission of data over radio waves.
WiFi, or wireless fidelity, is a technology that allows devices to connect to the internet or a local network without using wires. more, WiFi uses radio waves to transmit data between devices and access points, such as routers or modems. So, WiFi devices use frequency hopping to avoid interference from other wireless signals and to increase security and reliability. In addition, WiFi operates in the 2.4 GHz and 5 GHz frequency bands, which are divided into multiple channels. WiFi devices can switch between these channels to find the best one for communication.
Bluetooth is a technology that allows devices to communicate with each other over short distances using radio waves. Bluetooth devices use frequency hopping to establish and maintain connections, as well as to avoid interference from other wireless signals. Bluetooth operates in the 2.4 GHz frequency band, which is divided into 79 channels. Bluetooth devices can hop between these channels up to 1600 times per second2.
GPS, or global positioning system, is a technology that uses satellites to provide location and time information to devices on Earth. GPS satellites transmit signals on two frequencies: L1 (1575.42 MHz) and L2 (1227.60 MHz). GPS receivers use frequency hopping to acquire and track these signals, as well as to reduce noise and interference from other sources. GPS receivers can hop between these frequencies up to 50 times per second3.
As you can see, Hedy Lamarr’s invention of frequency hopping has influenced many modern technologies that we use every day. She was a remarkable woman who combined beauty and brains, and who deserves more recognition for her achievements in science and engineering.