What is the difference between OFDMA and SC-FDMA?

What is the difference between OFDMA and SC-FDMA?

From the figure it is imperative that OFDMA is multi-carrier system with one data symbol carried over by one subcarrier; while SC-FDMA is a single carrier system where in each qpsk symbol is carried by one much wider bandwidth subcarrier.

Why we are using SC-FDMA in LTE uplink instead of OFDMA?

Owing to its inherent single carrier structure, a prominent advantage of SC-FDMA over OFDM and OFDMA is that its transmit signal has a lower peak-to-average power ratio (PAPR), resulting in relaxed design parameters in the transmit path of a subscriber unit.

What is the advantage of using SC-FDMA in the uplink?

Single-carrier frequency division multiple access (SC-FDMA) is common choice for uplink of long term evolution (LTE) standard for broadband wireless communication. SC-FDMA is preferred for LTE uplink mainly due to its advantage of having low peak-to-average power ratio (PAPR) during signal transmission.

What does OFDMA do?

Orthogonal frequency-division multiple access (OFDMA) is a feature of Wi-Fi 6 (802.11ax) that allows access points to serve multiple clients at the same time.

What is the difference between SC-FDMA and OFDMA?

SC-FDMA system is less sensitive to frequency offset compare to OFDM system. SC-FDMA is widely used in LTE subscriber terminals in the transmit path and its variant OFDMA is used in the eNodeB downlink (or receive path of LTE subscribers).

What is the difference between SC-FDMA and PAPR?

In SC-FDMA, PAPR is same as that of original qpsk data symbols as M qpsk data symbols are transmitted in series at M times rate compare to OFDMA. Refer PAPR article to understand Peak to Average Power Ratio.

Why is SC-FDMA preferred for LTE uplink?

Single-carrier frequency division multiple access (SC-FDMA) is common choice for uplink of long term evolution (LTE) standard for broadband wireless communication. SC-FDMA is preferred for LTE uplink mainly due to its advantage of having low peak-to-average power ratio (PAPR) during signal transmission.

What is single carrier frequency division multiple access (SC-FDMA)?

Single carrier frequency division multiple access (SC-FDMA) is a promising uplink transmission technique that has the characteristic of low peak to average power ratio. The mobile terminal uplink transmission depends on the batteries with limited power budget.