Ofdm symbol rate

OFDM can generate a new symbol (composed of 48 subcarriers) every 4 microseconds. Based on that, it's possible to signal 250,000 symbol transitions every second on each of the subcarriers.

1. What is symbol in OFDM?
2. How is OFDM symbol duration calculated?
3. What is OFDM symbol time?
4. What is symbol rate and bit rate?

What is symbol in OFDM?

Orthogonal frequency division multiplexing (OFDM) takes a digital information signal with bit rate R_b, maps n-bit words on to M = 2ⁿ symbols (each symbol being a complex number representing the amplitude and phase of an M-ary modulation scheme), splits the resulting symbol stream (rate R_s = R_b/n) into N parallel ...

How is OFDM symbol duration calculated?

The duration of your ofdm symbol is Ts=Tt/(N+Ng).

What is OFDM symbol time?

Each OFDM subcarrier is 312.5 KHz. _{Figure 1: 802.11n/ac 20 MHz channel—OFDM subcarriers}. 802.11ax introduces a longer OFDM symbol time of 12.8 μs, which is four times longer than the legacy symbol time of 3.2 μs.

What is symbol rate and bit rate?

The symbol rate is measured in baud (Bd) or symbols per second. In the case of a line code, the symbol rate is the pulse rate in pulses per second. Each symbol can represent or convey one or several bits of data. The symbol rate is related to the gross bit rate, expressed in bits per second.