The 802.11a standard uses the same core protocol as the original standard and was the first of the 802.11 family to operate in the 5 GHz band. It uses a 52-subcarrier orthogonal frequency-division multiplexing (OFDM) with a maximum raw data rate of 54 Mbit/s, which typically yields a throughput in the mid-20 Mbit/s.
Read moreHow does OFDM work on Wi-Fi?
OFDM takes an RF channel, such as the 20 MHz channel often used in Wi-Fi, and instead of using a single carrier-frequency modulated by AM, FM, or other means, sets out a number of sub-carriers. 802.11ac used 52 data-carrying sub-carriers in a 20 MHz RF channel, while 802.11ax has 234.
Read moreWhat is OFDM wireless?
Orthogonal frequency-division multiplexing is a method of data transmission where a single information stream is split among several closely spaced narrowband subchannel frequencies instead of a single Wideband channel frequency .
Read moreIs OFDM used in 2.4 GHz?
OFDM-based wireless LANs will be implemented in the 2.4GHz ISM band as well as the 5GHz band. OFDM WLANs provide very high data rates, resilience to multipath and extended operating range.
Read moreWhat is the difference between MIMO and OFDMA?
While these technologies are similar, there are key differences you should know: OFDMA allows multi-user access by subdividing a channel . MU-MIMO allows for multi-user access by using different spatial streams.
Read moreDoes LTE use OFDM or OFDMA?
LTE uses OFDM as the basic signal format – OFDMA in the downlink and SC-FDMA in the uplink with various modulation formats. OFDM forms the basic signal format used within 4G LTE.
Read moreWhat is an advantage of OFDMA over OFDM and what are dis advantages?
Following are the benefits or advantages of OFDMA: ➨Unlike OFDM which allocates all the subcarriers of the OFDM symbol to one user, OFDMA allocates subset of subcarriers to different users . Hence OFDMA makes efficient use of frequency allocations in comparison to FDMA and OFDM. ➨It provides multi-user diversity.
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