Title :
UEP Schemes for Multimedia Transmission in Space-Time Coded Systems
Author :
Han, Changcai ; Wu, Weiling
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
A system model based on multilayered space-time trellis codes (ML-STTC) is constructed for multimedia transmission over wireless communication systems with multiple antennas both at the transmitter and the receiver. In this model, Space-time Trellis Code (STTC) and Layered Space-time (LST) architecture are combined to achieve diversity and multiplexing gains provided by multiple-input and multiple-output (MIMO) technology. According to the characteristics of ML-STTC, the unequal error protection (UEP) scheme based on diversity gains is introduced for images first, and then the UEP scheme is strengthened by power allocation among antenna layers. Simulation results reveal the UEP schemes can improve the peak signal-to-noise ratio (PSNR) of reconstructed images in an environment with a moderate range of signal-to-noise ratio (SNR).
Keywords :
diversity reception; error statistics; multimedia communication; multiplexing; receiving antennas; space-time codes; transmitting antennas; trellis codes; LST architecture; MIMO technology; STTC architecture; UEP schemes; diversity gains; multilayered space-time trellis codes; multimedia transmission; multiple antennas; multiple-input multiple-output technology; multiplexing gains; power allocation; space-time coded systems; unequal error protection scheme; wireless communication systems; Convolutional codes; Error correction codes; MIMO; Multimedia systems; PSNR; Receiving antennas; Space technology; Transmitters; Transmitting antennas; Wireless communication;
Conference_Titel :
Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on
Conference_Location :
Kokura
Print_ISBN :
978-1-4244-1473-4
DOI :
10.1109/ICCCAS.2007.4348126
