pub fn preamble(ofdm: &Ofdm, seed: u64) -> Result<Vec<C64>>Expand description
The preamble of Schmidl & Cox (with its cyclic prefix): QPSK on the even active subcarriers (scaled by $\sqrt{2}$ to keep the unit power), nothing on the odd ones.
ยงErrors
comnum_core::Error::Shape if the prefix is longer than the block.