An OFDM based system for transmission of JPEG2000 images using Unequal Power Allocation

Using an adaptive UPA scheme with a channel-aware OFDM technique for wireless transmission of JPEG2000 images

“…2. We have presented detailed explanations on the functionality of each unit in [10]. For the sake of completeness, we present a short overview of the system model here.…”

“…In that study, we chose to be 10 for all SNR values to maintain a low complexity while not jeopardizing the accuracy of the algorithm. We have mathematically shown in [10] how the number of groups in the UPA algorithm impacts the total end to end received distortion. In this paper, we incorporate an adaptive scheme into the UPA algorithm such that for every SNR value a different group number, that contributes to a higher PSNR of the received image, is chosen.…”

“…The benchmark for our simulations is the PSNR profile of the received images transmitted over block fading non-frequency selective channel with UPA algorithm. We also apply our UPA-OFDM algorithm, developed in [10], with and without the channel assignment strategy before the transmission. In addition, impact of employing the adaptive UPA scheme along with the channel assignment strategy is also investigated.…”

“…Even though, Houas et al proved the efficiency of their UEP technique in an OFDM system [6]; however, the effective performance of an optimized UPA scheme for transmission of JPEG2000 images in frequency selective channels has not yet been analyzed. To address this issue, we proved the efficiency of our proposed optimized UPA scheme for frequency selective channels in [10] by combining the UPA algorithm with the OFDM technique. In this paper, we further improve the optimization performance of our UPA algorithm by incorporating an adaptive scheme to categorize the coding passes into variable size group numbers.…”

“…This scheme aims at realizing the best number of groups required for division of the coding passes at each SNR value. • Following [10], We utilize a channel assignment strategy, within the OFDM transmitter, which detects the channel gain of each subcarrier and transmits the more important symbols over the subcarriers with higher channel gain. • Finally, a comprehensive Monte Carlo simulation study is presented to demonstrate the efficiency of the proposed adaptive scheme and the channel assignment strategy in the UPA-OFDM system.…”