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What is OFDMA technology?



What is OFDMA technology?


Given the great demand for a high network speed, due to the exchange of information from anywhere and at all times of the day, wireless broadband emerges.

These networks use multiple access techniques and transmission technologies, one of the latest being Orthogonal Frequency Division Multiple Access, better known as OFDMA for its acronym in English. It’s about a modulation method for new generation of wireless broadband access.

How does OFDMA technology work?

Orthogonal Frequency Division Multiple Access has been created to overcome the interference between transmitter and receiver and thus take advantage of the frequency spectrum. Also, this is the multi user version of the previous OFDM.

This system allows the low speed simultaneous transmission of data from various users, from a subset of subcarriers assigned to a particular or to different low interference channels. In addition to correcting faulty information based on codes.

FDMA vs. OFDMA

Frequency Division Multiple Access, better known as FDMA, is a multiplication technique used in digital, analog and radio frequency communications protocols, such as mobile telephony equipment in GSM networks. Having explained this, we must understand that OFDMA is the version of FDMA in which the subcarriers are orthogonal to each other.

One of the main differences between FDMA and OFDMA is that the latter has a greater synchronization in frequency and with more ingenious implementations.

While FDMA divides the available spectrum into frequency channels for each user to use two channels at the same time for your communication, one that transmits information to the network and another that receives information from the network. These are known as uplinks and downlinks, respectively.

Advantages of OFDMA

Header image by Gonzalo Chavarri.