Howtosignalprocessing
- What is OFDM spectrum?
- Is OFDM spread spectrum?
- What is a characteristic of OFDM channel subcarriers?
- What is a characteristic of orthogonal frequency division multiplexing channel subcarriers?
What is OFDM spectrum?
What is orthogonal frequency-division multiplexing (OFDM)? Orthogonal frequency-division multiplexing is a method of data transmission where a single information stream is split among several closely spaced narrowband subchannel frequencies instead of a single Wideband channel frequency.
Is OFDM spread spectrum?
OFDM can also be used as a spread spectrum modulation (OFDM-SS) [3, 4, 5] wherein spectral spreading is accomplished by putting the same data on all the carriers, producing a spreading factor equal to the number of carriers.
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 a characteristic of orthogonal frequency division multiplexing channel subcarriers?
OFDM: Orthogonal Frequency Division Multiplexing, is a form of signal modulation that divides a high data rate modulating stream placing them onto many slowly modulated narrowband close-spaced subcarriers, and in this way is less sensitive to frequency selective fading.
