Crest Factor reduction block minimizes the likelihood that a transmission side Power Amplifier (PA) gets saturated while transmitting a OFDM signal common in 5G. This can occur when a OFDM waveform has a high Peak to Average Power Ratio (PAPR).
The CFR block needs to sense the maximum peak on a Symbol and reduce the maximum without altering the phase shift. CFR transmits the same QAM symbols with corrected amplitude as long as the amplitude exceeds certain magnitude.
Crest Factor reduction IP
Overview
Block Diagram
