Ofdm

OFDM Transmitter knowledge

OFDM Transmitter knowledge
  1. Why FFT is used in OFDM transmitter?
  2. How is OFDM implemented?

Why FFT is used in OFDM transmitter?

Implementation of OFDM deals with application of Fast Fourier Transform (FFT) to modulation and demodulation processes to generate carriers orthogonal to each other. In conventional system, IFFT (Inverse Fast Fourier Transform) is used at transmitter side and FFT is used in receiver side.

How is OFDM implemented?

Orthogonal frequency division multiplexing (OFDM) takes a digital information signal with bit rate Rb, maps n-bit words on to M = 2n symbols (each symbol being a complex number representing the amplitude and phase of an M-ary modulation scheme), splits the resulting symbol stream (rate Rs = Rb/n) into N parallel ...

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