Difference between ofdm and ofdma pdf

1. What is the difference between OFDM and OFDMA?
2. What is the difference between OFDMA and SC-FDMA?
3. What is OFDMA and how it works?
4. Does LTE use OFDM or OFDMA?

What is the difference between OFDM and OFDMA?

The difference is that OFDMA is multi-user where OFDM is single-user. It has 3x higher throughput than single-user OFDM for short packets of data or multiple endpoints. OFDMA combines transmissions and sends frames to multiple endpoints simultaneously. It is more efficient with lower latency transmission.

What is the difference between OFDMA and SC-FDMA?

SC- FDMA has a lower PAPR and lower sensitivity to carrier frequency errors while OFDMA provides better frequency diversity resulting in better immunity against multipath fading.

What is OFDMA and how it works?

As a refresher, OFDMA stands for orthogonal frequency division multiple access. OFDMA is a multi-user version of OFDM enabling concurrent AP communication (uplink & downlink) with multiple clients by assigning subsets of subcarriers, called Resource Units (RUs) to the individual clients.

Does LTE use OFDM or OFDMA?

One of the key elements of LTE is the use of OFDM (Orthogonal Frequency Division Multiplex) as the signal bearer, as well as OFDM's associated access schemes, OFDMA (Orthogonal Frequency Division Multiple Access) and SC-FDMA (Single Carrier Frequency Division Multiple Access).