Contents
Why is peak to average power ratio important?
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 is the peak to average ratio of a signal determined?
It was shown that the peak-to-average ratio is partially a function of the relative amplitude of each state and the percentage of time the signal spends in each of those states. Another factor, not yet taken into account, is the filtering applied to the signal.
What does par mean for peak to average power?
The “peak to average power” level, usually expressed in dB, is the power level of the highest instantaneous power compared to the average power level. A PAR of 1, or 0 dB, means the signal is of constant power, so the peak power is equal to the average power.
What is the peak to average ratio of CDMA?
Both OFDM and CDMA have what is known as high peak to average ratios, or PARs, on the order 10–20 times, or 10–13 in decibels. Every signal has an average power. The peak to average power level, usually expressed in decibels, is the power level of the highest instantaneous power compared to the average power level.
Is the PAPR the same as the power ratio?
It should also be noted that PAPR can be defined as power-to-average power ratio, but sometimes the term peak-to-average power ratio is used. In the former case, the statistical distribution of the power-to-average power ratio is generated and the PAPR is thus a statistical distribution function.
What is the maximum power of a PA?
The maximum input power for the PA is 0 dBm, and it has a typical gain of 20 dB. Maximum achievable output power for the PA is +20 dBm. At 0 dBm input power, the PA starts to enter the saturation region. Higher input power would mean that the PA would be operating in the compression region.