Duration

802.11a OFDM Long Preamble Cyclic Prefix

802.11a OFDM Long Preamble Cyclic Prefix
  1. How do you find the length of a cyclic prefix?
  2. What is symbol duration in OFDM?
  3. What is the duration of long cycle prefix in LTE?

How do you find the length of a cyclic prefix?

Therefore, the number of samples allocated for cyclic prefix can be calculated as Ncp=Tcp*N/T, where N is the FFT/IFFT length, T is the IFFT/FFT period and Tcp is the duration of cyclic prefix.

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 the duration of long cycle prefix in LTE?

LTE uses two types of CP, normal CP of 4.7 microseconds and Extended CP of 16.7 microseconds.

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