OFDM system capacity if we double the subcarriers

1. What happens if number of subcarrier is increased?
2. How to calculate number of subcarriers in OFDM?
3. How many subcarriers are there in OFDM?
4. How does OFDM subcarrier work?

What happens if number of subcarrier is increased?

The results obtained showed that as the number of subcarriers increased from 32, through 64 to 128, the BER increased accordingly for all the mobile speeds considered and the effect is more noticeable at high signal-to-noise ratio. The increase in bit error rate indicates performance degradation.

How to calculate number of subcarriers in OFDM?

If you divide the channel bandwidth (20 MHz) by the subcarrier bandwidth (312.5 kHz) you will see that 802.11a/g comprises 64 subcarriers.

How many subcarriers are there in OFDM?

A single OFDM symbol contains 52 subcarriers; 48 are data subcarriers and 4 are pilot subcarriers.

How does OFDM subcarrier work?

Both OFDM and OFDMA divided a channel into subcarriers through a mathematical function known as an inverse fast Fourier transform (IFFT). The spacing of the subcarriers is orthogonal, so they will not interfere with one another despite the lack of guard bands between them.