DocumentCode :
59605
Title :
Low Complexity Power Optimization Algorithm for Multimedia Transmission Over Wireless Networks
Author :
Mukhtar, Hamid ; Al-Dweik, A. ; Al-Mualla, M. ; Shami, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Khalifa Univ., Abu Dhabi, United Arab Emirates
Volume :
9
Issue :
1
fYear :
2015
fDate :
Feb. 2015
Firstpage :
113
Lastpage :
124
Abstract :
This paper considers the problem of transmit power optimization for multimedia applications in continuous high-speed transmission over wireless networks. The power optimization process is developed by noting that some performance metrics such as throughput, delay and peak signal-to-noise ratio (PSNR) for particular systems with hybrid automatic repeat request (HARQ) may exhibit a staircase behavior. In such scenarios, the corresponding metric remains fixed for a wide range of signal-to-noise ratios (SNRs). Consequently, the transmit power can be reduced significantly while the relevant metric remains almost unchanged. The obtained results reveal that invoking power optimization algorithms can achieve a significant power saving of about 80% for particular scenarios. The system considered in this work is a truncated HARQ with turbo product codes (TPC) and parallel concatenated convolutional codes (PCCC). Chase combining is also used to combine the retransmitted packets with the original transmission. An efficient semi-analytical model is developed to obtain the system throughput in additive white Gaussian noise (AWGN) and Rayleigh fading channels. The obtained results also show that using the throughput, delay or PSNR as performance metrics provides equivalent power saving results.
Keywords :
AWGN channels; Rayleigh channels; automatic repeat request; concatenated codes; convolutional codes; optimisation; product codes; turbo codes; wireless channels; AWGN channel; PCCC; Rayleigh fading channel; SNR; TPC; additive white Gaussian noise channel; high-speed transmission; hybrid automatic repeat request; low complexity power optimization; multimedia applications; multimedia transmission; parallel concatenated convolutional codes; power optimization process; retransmitted packets; semianalytical model; signal-to-noise ratios; truncated HARQ; turbo product codes; wireless networks; Automatic repeat request; Delays; Diversity reception; Fading; Optimization; Signal to noise ratio; Throughput; Hybrid automatic repeat request; power optimization; throughput; turbo product codes;
fLanguage :
English
Journal_Title :
Selected Topics in Signal Processing, IEEE Journal of
Publisher :
ieee
ISSN :
1932-4553
Type :
jour
DOI :
10.1109/JSTSP.2014.2331915
Filename :
6838979
Link To Document :
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