面向超宽带医学图像传输的物理层关键技术研究

项目名称： 面向超宽带医学图像传输的物理层关键技术研究

项目编号： No.61271241

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王琳

作者单位： 厦门大学

项目金额： 76万元

中文摘要： 随着近几年无线体域网（WBAN）在医疗服务的迅速发展，由于医用图像的特殊属性和医疗诊断环境的高QoS要求，提供高可靠的医疗图像传输方案成为了医用WBAN的一个研究重点。面向课题组长期发展的FM-DCSK UWB无线传输技术框架，基于低硬件复杂度和低错误地板的原模图LDPC码型，1）提出基于联合信源信道编码的速率自适应传输方案及其联合检测机理，以实现医疗图像的可靠传输；2）重点研究用于高速低BER医疗图像传输的信源信道联合编码。根据医学图像的非等概特性，提出联合EXIT算法和联合渐进重量分析，设计性能良好的联合信源信道原模图LDPC编码码型，并提出信源信道编码码率最优分配算法，以构建短距离无线环境下高PSNR的传输平台；3）根据医学图像信息的ROI特性，提出原模图联合编码的不等错保护方案。利用原模图码的码率自适应特点，对不等重要信息进行不同的码率分配，保证医学重要信息不丢失，以提高传输速率。

中文关键词： 超宽带无线传输；自适应传输；联合信源信道编码设计；不等差错保护；

英文摘要： With the rapid development of wireless body network in medical services, due to the characteristics of medical images and stringent QoS requirements in medical environment, it becomes very important to provide a high reliable medical image transmission scheme. Under FM-DCSK UWB wireless transmission that we have been developing, based on protograph LDPC code of simple hardware implementation complexity and low error floor,1) we propose a joint source and channel coding of rate adaptive transmission to achieve reliable communication；2) we focus on the research of joint coding design with the aim of high speed and low BER transmission. Combing non-uniform property of medical images, we try to obtain a good joint source and channel protograph LDPC coding scheme with the help of the proposed joint EXIT analysis and joint asymptotic weight analysis； The optimal rate-allocation algorithm for source and channel protograph LDPC codes is also studied to form short-range transmission system of high received PSNR; 3) according to Region of Interesting (ROI) of medical images, the unequal error protection scheme for joint coding is also developed. The inherent rate-adaptability of protograph LDPC codes is employed, which helps allocate different rates to image information of different importances. Thus the important medica

英文关键词： Ultra-wide Band Wireless Transmission；Adaptive Transmission；Joint Source and Channel Coding Design；Unequal Error Protection；