OFDM training symbol format

1. What are training symbols in OFDM?
2. What are OFDM symbols?
3. What is OFDM symbol rate?
4. How many subcarriers are in OFDM?

What are training symbols in OFDM?

Training OFDM symbols or equivalently OFDM preambles are transmitted at the beginning of the transmission record, while pilot symbols (complex exponentials in time) are embedded in each OFDM symbol, and they are separated from information symbols in the frequency-domain [1–3].

What are OFDM symbols?

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 ...

What is 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.

How many subcarriers are in OFDM?

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