Open AccessTransmission of JPEG2000 images over frequency‐selective channels with unequal power allocation
Author(s) -
Shayegannia Moein,
Hajshirmohammadi Atousa,
Muhaidat Sami,
Torki Mahin
Publication year - 2013
Publication title -
iet image processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.401
H-Index - 45
eISSN - 1751-9667
pISSN - 1751-9659
DOI - 10.1049/iet-ipr.2012.0179
Subject(s) - orthogonal frequency division multiplexing , cyclic prefix , computer science , jpeg 2000 , transmission (telecommunications) , distortion (music) , image quality , channel (broadcasting) , fading , coding (social sciences) , multiplexing , algorithm , mathematics , telecommunications , image (mathematics) , image compression , artificial intelligence , image processing , statistics , bandwidth (computing) , amplifier
In this study, transmission of JPEG2000 images using an unequal power allocation (UPA) scheme and orthogonal frequency division multiplexing (OFDM) over block‐fading frequency‐selective channels is presented. A distortion model is provided to evaluate the contribution of each coding pass (CP) in the construction of the received image. The optimisation algorithm exploits the hierarchical structure of the JPEG2000 images and uses the distortion model along with the channel state information for allocating optimal values of power for each CP to minimise the end‐to‐end distortion. Furthermore, the actual total power consumed for transmission is measured and compared with the total power initially assigned. For the purpose of simulations, the authors set the number of OFDM subcarriers to be 16, the length of the cyclic prefixes equal to the channel memory length and analyse the quality of the received image in a 2‐tap and 3‐tap frequency‐selective channel, with and without our proposed UPA technique in an OFDM system. The results show an improvement of up to 10.5 dB in the decoded image quality when the UPA scheme is used. In addition, our system manages to maintain similar quality for the received image in a multi‐tap channel scenario.