Jpeg 2000 Transmission over Wireless Channels Using Unequal Power Allocation

We address the issue of JPEG2000 transmission over wireless channels using Unequal Power Allocation (UPA). First, an algorithm for multicasting JPEG2000 images over MIMO systems is proposed. According to antenna selection orders requested by receivers, the channel assignment unit transmits the substreams with different powers from antennas. The decoder is modified such that when two copies of a substream are available, they are used jointly to decode the image. Second, we propose a UPA algorithm to transmit JPEG2000 images over flat-fading channels. The contribution of coding passes in the quality of the decoded image is extracted. According to these contributions, the optimization algorithm assigns different transmission powers to coding passes. When CSI is available, the powers are adjusted at the transmission time to compensate for the channel fading. Simulation results show that in both works presented, UPA acts as a simple yet fast method for image transmission over wireless channels.