Howtosignalprocessing
- What is the symbol duration?
- What is relation between bandwidth and symbol rate?
- What is symbol duration in OFDM?
- What is symbol rate and frequency?
What is the symbol duration?
The symbol duration time, also known as unit interval, can be directly measured as the time between transitions by looking into an eye diagram of an oscilloscope.
What is relation between bandwidth and symbol rate?
The possible data bandwidth is determined more by the worst case signal-to-noise ratio over the channel than by the symbol rate or channel bandwidth. (e.g. as an extreme case, in zero noise you can theoretically use an approaching infinite number of voltage level to encode lots of bits per symbol).
What is symbol duration in OFDM?
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.
What is symbol rate and frequency?
In digital modulation, the Symbol Rate determines the rate (frequency) at which symbols occur. A symbol may consist of one or more bits as determined by the modulation format. For example, in a BPSK. system, each symbol represents 1 bit; in a QPSKQuadrature phase shift keying system, each symbol represents 2 bits.
