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 OFDMA and how it works?
OFDMA follows a set of rules created for the transmission of data between more than one terminal (any device at the end of a transmission channel, such as a computer or phone) over a transmission medium (such as a wireless network). An example of how OFDMA works is when two phones send data over the same phone line.
Read moreWhat is OFDMA in communication?
OFDMA is the multi-user variant of the OFDM scheme where multiple access is achieved by assigning subsets of time-frequency resources to different users, allowing simultaneous data transmission from several users .
Read moreWhy there is need of OFDM role of OFDM in 5G?
5G Cellular Technology Tutorial Includes: OFDM gives good spectral efficiency whilst providing resilience to selective fading and it also enables multiple access capability to be implemented using OFDMA .
Read moreDoes 5G use SC FDMA?
Unlike LTE, 5G NR also supports CP-OFDM in the uplink direction. But LTE’s discrete Fourier transform spread OFDM (DFT-s-OFDM) uplink scheme, better known as single carrier frequency division multiplex (SC-FDMA), is still a valid access scheme and support is mandatory for any 5G terminal.
Read moreWhat modulation is 5G?
Phase shift keying: 5G technology implements quadrature phase shift keying, QPSK as the lowest order modulation format. Although this will provide the slowest data throughput it will also provide the most robust link and as such it can be used when signal levels are low or when interference is high.
Read moreWhy is CP-OFDM used in 5G?
5G NR CP-OFDM chain It is intended for MIMO (Multiple Input Multiple Output). They are like Gold sequences as used in PDSCH. CP-OFDM offers very high spectral packing efficiency in RBs (Resource blocks). It is employed when network operators need to maximize network capacity in dense urban environments .
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