Training

Use of Long Training Field (LTF) of 802.11 standard

Use of Long Training Field (LTF) of 802.11 standard
  1. What is Long Training field?
  2. What is legacy long training field?
  3. Does 802.11 AC use OFDM?

What is Long Training field?

The High Throughput Long Training field provides means for the receiver to estimate the channel between each spatial mapper input (or spatial stream transmitter if no STBC is applied) and receive chain; the number of training symbols is equal or greater than the number of space time streams (with an exception in the ...

What is legacy long training field?

Legacy Long Training Field (L-LTF)

The L-LTF is BPSK modulated at 6 Mbps. It contains no channel coding, and is not scrambled. In the 20 MHz transmission mode: the legacy long training OFDM symbols are assigned to sub-carriers –26 to –1 and 1 to 26.

Does 802.11 AC use OFDM?

802.11ac uses OFDM (Orthogonal Frequency Division Multiplexing) just as 802.11a and 802.11n do.

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