Howtosignalprocessing
- What is the spacing between subcarriers in LTE?
- Why subcarrier spacing is 15 kHz in LTE?
- What is subcarrier spacing?
- Why only 12 subcarriers in LTE?
What is the spacing between 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.
Why subcarrier spacing is 15 kHz in LTE?
Simply, It is because 3G and LTE have the same clock timing for multi technology handsets.
What is subcarrier spacing?
Subcarrier spacing is equal to the reciprocal of the symbol time. As a result of the longer symbol time, the subcarrier size and spacing decreases from 312.5 KHz to 78.125 KHz. The narrow subcarrier spacing allows better equalization and therefore enhanced channel robustness.
Why only 12 subcarriers in LTE?
In the downlink, the subcarriers are split into resource blocks. This enables the system to be able to compartmentalise the data across standard numbers of subcarriers. Resource blocks comprise 12 subcarriers, regardless of the overall LTE signal bandwidth. They also cover one slot in the time frame.
