Howtosignalprocessing
- What is phase noise in OFDM?
- What is a characteristic of OFDM channel subcarriers?
- What is the effect of increase in number of subcarrier in OFDM system?
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 a characteristic of OFDM channel subcarriers?
Key features of OFDM
Multiple carriers (called subcarriers) carry the information stream. The subcarriers are orthogonal to each other. A guard interval is added to each symbol to minimize the channel delay spread and intersymbol interference.
What is the effect of increase in number of subcarrier in OFDM system?
The results obtained showed that as the number of subcarriers increased from 32, through 64 to 128, the BER increased accordingly for all the mobile speeds considered and the effect is more noticeable at high signal-to-noise ratio. The increase in bit error rate indicates performance degradation.
