Pilot

Pilot subcarriers in ofdm

Pilot subcarriers in ofdm
  1. What are pilot subcarriers in OFDM?
  2. What is a pilot subcarrier?
  3. What is pilot signal in OFDM?
  4. How to calculate number of subcarriers in OFDM?

What are pilot subcarriers in OFDM?

Pilot Subcarriers: The pilot subcarriers do not carry modulated data; however, they are used for synchronization purposes between the receiver and transmitter.

What is a pilot subcarrier?

Pilot subcarrier. A subcarrier that serves as a control signal for use in the reception of FM stereophonic sound broadcasts.

What is pilot signal in OFDM?

A pilot symbol is a complete OFDM symbol where the value of each subcarrier is predefined and known in transmitter and receiver. It is repeated with a certain rate that depends on how fast the channel changes. The received signal is correlated with the pilot symbol to detect the OFDM symbol start.

How to calculate number of subcarriers in OFDM?

If you divide the channel bandwidth (20 MHz) by the subcarrier bandwidth (312.5 kHz) you will see that 802.11a/g comprises 64 subcarriers.

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