DocumentCode :
754586
Title :
Iterative Decision-Aided Clipping Compensation and Its Application to Scalable Video Transmission With Multiband OFDM
Author :
Zhang, Hong ; Xia, Xiang-Gen ; Zhang, Qian ; Zhu, Wenwu
Author_Institution :
Dept. of Electr. & Comput. Eng., Delaware Univ., Newark, DE
Volume :
56
Issue :
2
fYear :
2007
fDate :
3/1/2007 12:00:00 AM
Firstpage :
756
Lastpage :
765
Abstract :
Deliberate digital clipping is a simple and efficient way of controlling the peak-to-average power ratio of orthogonal frequency division multiplexing (OFDM) systems. However, a clipping is a nonlinear process that may lead to significant distortion and performance loss. An iterative time-domain decision-aided clipping compensation framework is proposed to mitigate the distortion caused by the intentional clipping with the additional constraint of out-of-band noise filtering, and it is compared with the existing frequency-domain scheme. It incorporates the simple additive distortion model and the minimum mean-square distortion (MMSD) model, with the options of hard and soft symbol estimation. Extensive simulation results are provided for the performance comparison among different schemes. The MMSD-distortion-model-based frequency-domain clipping compensation gives the best performance and is applied to scalable video transmission with a multiband OFDM. Simulations demonstrate an effective mitigation of the performance loss by the applied compensation algorithm
Keywords :
OFDM modulation; filtering theory; iterative methods; least mean squares methods; time-frequency analysis; video communication; digital clipping; distortion-model-based frequency-domain clipping; iterative time-domain decision-aided clipping compensation; minimum mean-square distortion model; multiband OFDM; orthogonal frequency division multiplexing systems; out-of-band noise filtering; peak-to-average power ratio; scalable video transmission; Control systems; Costs; Intersymbol interference; Nonlinear distortion; OFDM; Peak to average power ratio; Performance loss; Time domain analysis; Transmitters; Wireless LAN; Digital clipping; OFDM; iterative cancellation; iterative compensation; iterative reconstruction; multiband orthogonal frequency division multiplexing (OFDM); scalable video;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2007.891468
Filename :
4138024
Link To Document :
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