Title :
Source-Aware Adaptive Power Allocation in OFDM Systems for Rate Constrained Applications
Author :
De, Suvranu ; Saini, Ritu ; Sharma, Ashok
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Delhi, New Delhi, India
Abstract :
In a wireless OFDM system, due to channel fading all subcarriers are not always usable for an acceptable performance. In this paper, we propose two source-aware and channel-adaptive OFDM resource allocation approaches that judiciously selects the optimum required subcarriers. The first scheme increases the power efficiency while maintaining a chosen reception quality, whereas the second scheme shows a significant improvement in reception quality for a given power budget.
Keywords :
OFDM modulation; fading channels; resource allocation; telecommunication power management; channel fading; channel-adaptive OFDM resource allocation; power budget; power efficiency; rate constrained applications; reception quality; source-aware adaptive power allocation; wireless OFDM system; Bit error rate; Discrete wavelet transforms; Gain; OFDM; Resource management; Streaming media; Vectors; Adaptive OFDM system; DWT source; distortion minimization; power allocation; power minimization;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2358648
