OFDM pipeline
Protocol
Keep it simple, stupid OFDM pipeline.
Signal structure
- encode data bits
- add preamble symbols
- add 32 pilots
- zeros in DC area [-7..7]
- zeros left/right ends of spectrum [-128..-97, 97...127]
- 128 data subcarriers per symbol
- BPSK modulation
- IFFT 256
- 1/4 Guard Inteval
Transmitter
Tx bit-stream
Generating randomized bit-stream, modulating with BPSK, tagging each 128 bit.
Tx OFDM modulator
Allocating each of 128-bit to one of 256 subcarriers, FFT, CP
Channel
Very simple AWGN channel.
Receiver
Rx OFDM demodulator
