Howtosignalprocessing
The LTE downlink signal does not use the DC OFDM subcarrier, in order to avoid problems in the transmitters and receivers related to local oscillator leakage, ADC response, etc.
- What is the use of DC subcarrier in LTE?
- Why are there 12 subcarriers in LTE?
- What is DC subcarrier in 5g?
What is the use of DC subcarrier in LTE?
DC stands for Direct Current and it is a subcarrier that has no information sent on it. This is an important subcarrier in OFDM based systems. It is used by the mobile device to locate the center of the OFDM frequency band. So, if LTE does not have a DC subcarrier, it would be a big deal.
Why are there 12 subcarriers in LTE?
In LTE, each subcarrier is spaced 15 kHz apart. These subcarriers are combined in groups of 12 to form a single resource block. Each resource block is used in an OFDMA arrangement to send data to different handsets or combined for high-speed data.
What is DC subcarrier in 5g?
DC subcarrier
This is the subcarrier in the OFDM/OFDMA signal whose frequency would be equal to the RF Center frequency of the station. Generally, all devices have the DC coinciding with the center frequency. NR: DC subcarrier is used as NR devices may not be centered around the carrier frequency.
