Adaptive image tranmission system based on cognitive radio
Yulong Gao, Yanping Chen, Yongkui Ma · 2010 3rd International Congress on Image and Signal Processing · 2010
According to theorem of cyclostationary process, bandwidth and amplitude are estimated, and then channel capacity is calculated, the interference temperature is considered synchronously, this accord with actual surroundings of cognitive radio system. The simulation and theory analysis prove the validity of the presented algorithm. JPEG2000 compression/decompression are realized using special JPEG2000 IC chips and FPGA. The chips and parameters collocation are controlled by NiosII soft kernel processor embedded in FPGA, A/D conversion and D/A conversion are implemented by ADV7189 and ADV7179, respectively, and image decompression/compression are implemented by ADV212 thought configuring different parameters. The methods using pumping field parameters and changing decompression parameters are used to meet the demand of different spectrum hole.