Pilot

How to choose pilot symbols count in OFDM?

How to choose pilot symbols count in OFDM?
  1. What is pilot symbol in OFDM?
  2. What are pilot subcarriers in OFDM?
  3. What is pilot based channel estimation?

What is pilot symbol in OFDM?

Training OFDM symbols or equivalently OFDM preambles are transmitted at the beginning of the transmission record, while pilot symbols (complex exponentials in time) are embedded in each OFDM symbol, and they are separated from information symbols in the frequency-domain [1–3].

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 pilot based channel estimation?

Pilot-based channel estimation estimates the channel information by obtaining the impulse response from all sub-carriers by pilot. Compared with blind channel estimation, which uses statistical information of the received signals, pilot-based channel estimation is a practical and an effective method.

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