A Study of Diversity Combing Schemes for Wireless Compressed Image Transmission System under PBNJ

• Main Authors: Yu-Ting Lin, 林宥廷
• Other Authors: Li-Der Jeng
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/pxx45r

碩士 === 中原大學 === 通訊工程碩士學位學程 === 106 === In this paper, we propose a wireless compressed image transmission system under partial band noise jamming (PBNJ). To increase the transmission efficiency , we consider the compressed image to be transmitted. Low-Density Parity Check codes (LDPC) become popular because of its flexibility in codeword length and better performance than those of other channel codes. This study, we propose a image transmission system which empolyed LDPC code under partial band noise jamming (PBNJ). Besides, we also propose Image compression and Different levels Unequal Error Protect and two diversity combing method which integrated the information after image process and channel information. In addition, this paper proposes to improve the structure of tree set partitioning compression method (Modify Set Paritioning In Hierachical Tree, MSPIHT) image transmission quality enhance, is to use the enhance to the threshold, so that the coefficient after compression, the restore at the same time, more approaching the characteristics of the original image pixel values represent, with the amount of data of the header protection. The experimental results show that this technology will only use the single-channel coding or traditional compression techniques more effective.