Howtosignalprocessing
- Which signal processing in LTE has lower peak to average power ratio?
- How to reduce PAPR in OFDM?
- Why should PAPR be low?
- How does a high peak to average power ratio PAPR affect OFDM systems?
Which signal processing in LTE has lower peak to average power ratio?
Crest Factor Reduction (CFR)
Crest Factor Reduction, or CFR is a technique adapted to reduce Peak to Average Power Ratio (PAPR) of transmitted signals for efficient operation of power amplifiers.
How to reduce PAPR in OFDM?
In an OFDM system, a large number of subcarriers are used to transmit the modulated symbols and consequently, the OFDM signals have a high peak-to-average power ratio (PAPR). To reduce the high PAPR, we propose a partial transmit sequence (PTS) method based on the adaptive particle swarm optimization.
Why should PAPR be low?
The peak-to-average power ratio (PAPR) of a signal waveform is an important metric as a small value implies that the power amplifier used to transmit signals can operate more efficiently and thus save battery in the UE (see also Section 11.3. 1.1).
How does a high peak to average power ratio PAPR affect OFDM systems?
However, one of the most serious problems is the high Peak-to-Average Power Ratio (PAPR) of the transmitted OFDM signal, since this large peaks introduce a serious degradation in performance when the signal passes through a nonlinear High-Power-Amplifier (HPA).
