QPSK Modulated OFDM Symbol after fading channel

1. What is QPSK in OFDM?
2. What are symbols in OFDM?
3. How do you calculate OFDM symbol duration?
4. How many bits does an OFDM symbol have?

What is QPSK in OFDM?

Quadrature phase shift keying (QPSK) is a digital modulation technique that transmits data at a constant frequency whilst varying the phases of the carrier signal. QPSK is one of the fundamental modulation schemes for orthogonal frequency division multiplexing systems (OFDM).

What are symbols 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 do you calculate OFDM symbol duration?

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

How many bits does an OFDM symbol have?

With 4 bit per symbol, 16-QAM, the maximum rises to 48 Mbps. Finally, using 64-QAM, which represents six bits of information with each symbol, the 12 megabaud channel is capable of 72 Mbps.