Title :
Performance of the wavelet domain diversity method for image transmission over Rayleigh fading channels
Author :
Ramac, Liane C. ; Varshney, Pramod K.
Author_Institution :
Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA
Abstract :
A wavelet domain diversity combining method to combat errors during wireless image transmission has been presented recently. For images represented in the wavelet domain, diversity is used to obtain multiple data streams corresponding to the transmitted image at the receiver. These individual image data streams are combined to form a composite image with higher perceptual quality. The SPIHT (set partitioning in hierarchical trees) algorithm is used for image compression, and diversity combining methods for the compressed images exploit the characteristics of the wavelet transform. For these images, unequal error protection is employed in conjunction with diversity combining. Performance of this scheme over Rayleigh fading channels is evaluated in this paper. Simulation results demonstrate that the quality of the received image can be significantly improved
Keywords :
Rayleigh channels; data compression; diversity reception; image coding; radio links; visual communication; wavelet transforms; Rayleigh fading channels; composite image; image compression; multiple data streams; received image quality; receiver; set partitioning in hierarchical trees algorithm; unequal error protection; wavelet domain diversity combining method; wavelet transform; wireless image transmission; Diversity methods; Diversity reception; Error correction codes; Fading; Image coding; Image communication; Partitioning algorithms; Streaming media; Wavelet domain; Wavelet transforms;
Conference_Titel :
Personal Wireless Communications, 2000 IEEE International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
0-7803-5893-7
DOI :
10.1109/ICPWC.2000.905918
