
99
Peak-to-average Power ratio
is downconverted and after serial-to-parallel conversion, it reaches the
FFT block.
e FFT algorithm is based on Equation (4.27) (Schniter, 2004)
as follows:
Xk xnekN,0,..., 1
jknN
2/
∑
() ()
−
−π
=
(4.27)
where FFT length (N) is equal to the total length of the signal,
which according to Equation (4.27) is K + L. e side information
is extracted from the received signal and so the multiplied phase
sequence is detected. In the receiver, the inverse operation of the mul-
tiplication is required, which is shown by division in the receiver block
diagram of Figure4.25.
Following the FFT, the received signal s
i
should be ...