Howtosignalprocessing
A single OFDM symbol contains 52 subcarriers; 48 are data subcarriers and 4 are pilot subcarriers.
- How to calculate number of subcarriers in OFDM?
- How many subcarriers are there?
- How many samples are there in an OFDM symbol?
- What is subcarrier mapping in OFDM?
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?
As shown in Figure 1, a 20 MHz 802.11n/ac channel consists of 64 subcarriers. Fifty-two of the subcarriers are used to carry modulated data; four of the subcarriers function as pilot carriers; and eight of the subcarriers serve as guard bands. OFDM are sometimes also referred to as OFDM tones.
How many samples are there in an OFDM symbol?
An 802.11a OFDM carrier signal (burst type) is the sum of one or more OFDM symbols each comprised of 52 orthogonal subcarriers, with baseband data on each subcarrier being independently modulated using quadrature amplitude modulation (available formats: BPSK, QPSK, 16-QAM, or 64-QAM).
What is subcarrier mapping in OFDM?
Subcarriers in cellphones, LTE 4G and 5G NR
Cellphone data uses subcarriers in OFDM and OFDMA arrangements to transmit data from the base station to the handset. In LTE, each subcarrier is spaced 15 kHz apart. These subcarriers are combined in groups of 12 to form a single resource block.
