By Topic

DWT based optimal power allocation schemes for scalable video transmission in OFDM based cognitive radio systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Kumar, A. ; Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India ; Jagannatham, A.K.

In this paper, we propose and investigate the performance of optimal power loading algorithms towards scalable video transmission over an Orthogonal Frequency Division Multiplexing (OFDM) based Cognitive radio (CR) system. The proposed power allocation scheme minimizes the overall video distortion while restricting secondary user interference. For this purpose, we employ the two level Daubechies wavelet D2 to encode the video as a layered scalable stream comprising of one Base layer and several enhancement layers. The coded video layers are assigned to the secondary OFDM subcarriers of the CR user. A convex optimization framework is developed for video distortion as a function of the subcarrier power allocation. We employ this framework and derive a closed form expression towards the optimal power allocation for video quality maximization. We also propose a low complexity scheme for near optimal video transmission. The performances of the proposed optimal schemes are compared in terms of the Peak Signal to Noise Ratio (PSNR) of the received video stream in the OFDM CR wireless system. Presented numerical results demonstrate that the proposed optimal scheme results in a significantly enhanced PSNR of video transmission compared to the competing scalable and non-scalable schemes.

Published in:

India Conference (INDICON), 2012 Annual IEEE

Date of Conference:

7-9 Dec. 2012