Howtosignalprocessing
- What are symbols in OFDM?
- How many OFDM symbols are there?
- What is OFDM explain it in detail with all its variants?
- What is OFDM symbol period?
What are symbols in OFDM?
Orthogonal frequency division multiplexing (OFDM) takes a digital information signal with bit rate Rb, 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 Rs = Rb/n) into N parallel ...
How many OFDM symbols are there?
The 802.11 OFDM frame has four distinct regions. The first region of the preamble consists of a short preamble. The short preamble contains 10 short symbols assigned to subcarriers -24, -20, -16, -12, -8, -4, 4, 8, 12, 16, 20, 24.
What is OFDM explain it in detail with all its variants?
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.
What is OFDM symbol period?
Each OFDM subcarrier is 312.5 KHz. Figure 1: 802.11n/ac 20 MHz channel—OFDM subcarriers. 802.11ax introduces a longer OFDM symbol time of 12.8 μs, which is four times longer than the legacy symbol time of 3.2 μs.
