Ofdm

Simulating noise in OFDM

Simulating noise in OFDM
  1. What is phase noise in OFDM?
  2. What is effective SNR?
  3. How OFDM signal is generated?

What is phase noise in OFDM?

With OFDM modulation, phase noise modifies the system by multiplying each received signal, in the time domain, by a random rotation factor e 3°m(n), whose correlation function, for n > 1, is given by Page 22 4 Note that, from (1.3) and (1.4), phase noise is a non-stationary random process with its correlation function ...

What is effective SNR?

Generally, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications. Learn more about Signal-to-Noise Ratio.

How OFDM signal is generated?

In OFDM the signal itself is first split into independent channels, modulated by data and then re-multiplexed to create the OFDM carrier. OFDM is a special case of Frequency Division Multiplex (FDM). As an analogy, a FDM channel is like water flow out of a faucet, in contrast the OFDM signal is like a shower.

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