Title :
A novel technique for low-power D/A conversion based on PAPR reduction
Author :
Giannopoulos, Th ; Paliouras, V.
Author_Institution :
Dept. of Electr. & Comput. Eng., Patras Univ.
Abstract :
Large dynamic range 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. This paper quantifies the impact of the partial transmit sequence (PTS) peak to average power ratio (PAPR) reduction algorithm on the complexity of a digital to analog converter (DAC). In particular, experimental results for an OFDM system with a large number of subcarriers demonstrate that the required DAC resolution is reduced by one bit, while its power consumption is reduced by a factor of two. In addition, this paper proposes two new sets of weighting factors which reduce the computational complexity of PTS by even 87.5%, while maintaining exactly the same performance
Keywords :
OFDM modulation; digital-analogue conversion; low-power electronics; radio transmitters; subcarrier multiplexing; OFDM systems; PAPR reduction algorithm; digital-to-analog converter; low-power D/A conversion; orthogonal frequency division multiplexing systems; partial transmit sequence; peak to average power ratio; wireless transmitter; Computational complexity; Digital-analog conversion; Dynamic range; Energy consumption; OFDM; Partial transmit sequences; Peak to average power ratio; RF signals; Radio frequency; Transmitters;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693754
