JPEG2000 image transmission over OFDM-based Cognitive Radio network

Cognitive Radio (CR) is an efficient way of spectrum utilization in the way that secondary users (SU) with high bandwidth (BW) requirements such as multimedia users, can get access to the licensed frequency resources opportunistically and resolve their BW limitation. Among all the multimedia formats, JPEG2000 has many features that makes it suitable for cognitive radio networks. In this paper a channel allocation method based on JPEG2000 and orthogonal frequency division multiplexing (OFDM) is proposed, which improves the quality of the SU´s received image by providing dynamic access to the available spectrum, without violating the interference requirement to the PU. Channels with better condition are used to transmit important data in JPEG2000 coded bit-stream. Therefore, reception of determinative bits is guaranteed.