Relationship among BER, power consumption and PAPR

The increased peak to average power ratio (PAPR) of the signal is a significant drawback for orthogonal frequency division multiplexing (OFDM) systems since it restricts the efficiency of the RF part of a wireless transmitter. An effective algorithm applied on the digital part of the transmitter to mitigate PAPR is the partial transmit sequence (PTS). Exploring only the power consumption in power amplifier (PA) the application PTS algorithm, reduces the total power consumption of the transmitter, including digital and analog part, up to 22% in comparison to OFDM systems where no PAPR reduction method is employed. Furthermore experimental results of a digital to analog converter (DAC) depict that for an OFDM system with a large number of subcarriers, PTS reduces the required resolution of DAC one bit, while power consumed at the DAC is reduced by a factor of two. In this paper we study the total power consumption at the transmitter when both DAC and PA are considered. Furthermore it is shown that the reduction of power consumption comes with no penalty on bit-error-performance (BER).