CAJ | 학술논문

针对无线环境信道系统恶劣且不稳定的特点，提出一种压缩感知和非对称Turbo码的联合信源信道编码方案。该方案将具有很好压缩性能的压缩感知技术与具有强纠错能力的非对称Turbo码结合实现了自适应图像压缩传输的联合信源信道编码。可以根据基于二维压缩感知的信道估计方法来估计无线信道环境，动态地调整压缩感知的参数以及非对称Turbo码的编码策略来提高图像的传输效率和重建质量。实验仿真结果表明，根据不同的无线信道环境采用不同的压缩感知的采用测量数以及非对称Turbo码的类型，能够提高图像的传输效率，使图像恢复质量与图像传输速率达到最优的平衡。
침대무선배경신도계통악렬차불은정적특점，제출일충압축감지화비대칭Turbo마적연합신원신도편마방안。해방안장구유흔호압축성능적압축감지기술여구유강규착능력적비대칭Turbo마결합실현료자괄응도상압축전수적연합신원신도편마。가이근거기우이유압축감지적신도고계방법래고계무선신도배경，동태지조정압축감지적삼수이급비대칭Turbo마적편마책략래제고도상적전수효솔화중건질량。실험방진결과표명，근거불동적무선신도배경채용불동적압축감지적채용측량수이급비대칭Turbo마적류형，능구제고도상적전수효솔，사도상회복질량여도상전수속솔체도최우적평형。
For the characteristic of channel system in radio environment being harsh and unstable, this paper proposed a jointing source and channel coding scheme which is based on compressed sensing and asymmetric Turbo codes.The scheme combines the compressed sensing technology which has good compression performance with the asymmetric Turbo code which has strong error correction capability, thus realises the joint source and channel coding with adaptive compressed image transmission.According to 2D compression sensing-based channel esti-mation method, this scheme estimates radio channel environment and dynamically adjusts the parameters of compressed sensing and the enco-ding strategies of asymmetric Turbo codes to improve image’ s transmission efficiency and the reconstruction quality.Experimental simulation results show that to use different measurement number of compressed sensing and types of asymmetric Turbo code according to different radio channel environment, the transmission efficiency of image can be improved, and the quality restoration and transmission rate of image can achieve the optimal balance.