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| Content Provider | IET Digital Library |
|---|---|
| Author | Shayegannia, Moein Hajshirmohammadi, Atousa Muhaidat, Sami Torki, Mahin |
| Abstract | 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. |
| Starting Page | 33 |
| Ending Page | 41 |
| Page Count | 9 |
| ISSN | 17519659 |
| Volume Number | 7 |
| e-ISSN | 17519667 |
| Issue Number | Issue 1, Feb (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-ipr/7/1 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2012.0179 |
| Journal | IET Image Processing |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Block Fading Frequency Selective Channel Channel Allocation Channel Coding Channel Memory Length Channel State Information Coding Pass Cyclic Prefixes Distortion Distortion Model Fading Channel Image And Video Coding Image Coding Image Quality JPEG2000 Image Modulation And Coding Method Multitap Channel Scenario OFDM Modulation Optimisation Optimisation Algorithm Orthogonal Frequency Division Multiplexing System Radio Link And Equipment Unequal Power Allocation UPA |
| Content Type | Text |
| Resource Type | Article |
| Subject | Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software |
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