首页|期刊导航|哈尔滨工业大学学报（英文版）|Robust transmission of progressive image bitstreams based on DCT over broadband wireless channels
哈尔滨工业大学学报（英文版）2006，Vol.13Issue(2)：219-225,7.
Robust transmission of progressive image bitstreams based on DCT over broadband wireless channels
Robust transmission of progressive image bitstreams based on DCT over broadband wireless channels
摘要
Abstract
A robust progressive image transmission scheme over broadband wireless fading channels is developed for 4th generation wireless communication systems (4G) in this paper. The proposed scheme is based on space-time block coded orthogonal frequency-division multiplexing ( OFDM ) with 4 transmit antennas and 2 receive antennas and uses a simplified minimum mean square error (MMSE) detector instead of maximum likelihood (ML) detectors. Considering DCT is simpler and more widely applied in the industry than wavelet transforms, a progressive image compression method based on DCT called mean-subtract embedded DCT (MSEDCT) is developed, with a simple mean-subtract method for the redundancy of reorganized DC blocks in addition to a structure similar to the embedded zerotree wavelet coding (EZW) method. Then after analyzing and testing bit importance of the progressive MSEDCT bitstreams, the layered unequal error protection method of joint source-channels coding based on Reed-Solomon (RS) codes is used to protect different parts of bitstreams,providing different QoS assurances and good flexibility. Simulation experiments show our proposed scheme can effectively degrade fading effects and obtain better image transmission effects with 10～20 dB average peak-signal-noise-ratio (PSNR) gains at the median Eb/No than those schemes without space-time coded OFDM or equal error protections with space-time coded OFDM.关键词
broadband communication/embedded source coding/image transmission/joint source-channel codingKey words
broadband communication/embedded source coding/image transmission/joint source-channel coding分类
信息技术与安全科学引用本文复制引用
WANG Dong-hua ,ZHOU Yuan-hua ,MA Zeng-dong..Robust transmission of progressive image bitstreams based on DCT over broadband wireless channels[J].哈尔滨工业大学学报（英文版）,2006,13(2):219-225,7.基金项目
Sponsored by the National Natural Science Foundation of China( Grant No. 60202006). （ Grant No. 60202006）
