The apparatus may be a transmitter. The transmitter including a modulator configured to modulate a binary input sequence with a particular modulation coding scheme to generate a modulated input signal. The transmitter also including a spectral shaping circuit configured to spectral shape a first version of the input signal to generate a spectral shaped signal. The spectral shaping circuit also includes a FIR filter configured to lower peak-to-average power ratio of the spectral shaped signal. The transmitter also includes a discrete Fourier transform circuit configured to discrete Fourier transform a second version of the input signal to generate a discrete Fourier transformed signal. The modulated input signal is one of the first version of the input signal or the second version of the input signal and the spectral shaped signal is another of the first version of the input signal or the second version of the input signal.
