To overcome the effect of multi path fading problem available in UMTS, LTE uses Orthogonal Frequency Division Multiplexing (OFDM) for the downlink – that is, from the base station to the terminal to transmit the data over many narrow band careers of 180 KHz each instead of spreading one signal over the complete 5MHz …
Read moreWhat type of modulation is used in cell phones?
Most radio systems and handsets use FM analog modulation that occupies a 25-kHz channel.
Read moreHow OFDM is used in LTE?
LTE uses a pre-coded version of OFDM called Single Carrier Frequency Division Multiple Access (SC-FDMA) in the uplink . This is to compensate for a drawback with normal OFDM, which has a very high Peak to Average Power Ratio (PAPR).
Read moreWhat is OFDM symbol in LTE?
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).
Read moreWhat is modulation in mobile networks?
Modulation is a process of mixing signals with a sinusoid to produce a new form of signals . The newly produced signal has certain benefits over an un-modulated signal. Mixing of low-frequency signal with a high-frequency carrier signal is called Modulation.
Read moreWhat is LTE OFDM?
Orthogonal frequency-division multiplexing (OFDM), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method . OFDM meets the LTE requirement for spectrum flexibility and enables cost-efficient solutions for very wide carriers with high peak rates.
Read moreIs LTE digital or analog?
This is the most exciting time in the mobile industry since the switchover from analog to digital back in the early 1990s. LTE represents a paradigm shift from hybrid voice and data networks to data-only networks.
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