Posted: April 20th, 2017

Until recently most low-speed devices used FHSS and higher-speed devices used DSSS; today Orthogonal Frequency Division Multiplexing is the new method. What is OFDM?

Until recently most low-speed devices used FHSS and higher-speed devices used DSSS; today Orthogonal Frequency Division Multiplexing is the new method. What is OFDM? How is it used? Why is it used? Class, before we jump in into the different modulation techniques, what is meant by modulation? Why is it important? What is the difference between analog and digital? Why did most technologies move to Digital? What drawbacks did analog transmission have? What are spread spectrums? How do FHSS and DSSS compare?