Переглядів 140,475
In 802.11 standards, three different modulation/transmission methods are used to transmit wireless signals: 1) Frequency Hopping Spread Spectrum, or FHSS; 2) Direct Sequence Spread Spectrum, or DSSS, and 3) Orthogonal Frequency Division Multiplexing, or OFDM.
These techniques are used for several reasons, including the reduction of natural interference, noise and jamming, and prevention of detection and interception.
In this lesson, I will focus on one of spread spectrum modulation methods used in wireless communications: Frequency-Hopping Spread Spectrum, or FHSS.
My topics are organized by playlists:
/ sunnylearning
My most popular videos:
ukposts.info...
Wireless and Wi-Fi
• CSMA/CA - Wireless Med...
This is my education channel. My topics cover networking, security, programming, data structure, algorithm, programming and other computer-related materials.
Please leave comments, questions and subscribe!
Thank you very much!
Sunny Classroom