标题：Optimizing multiuser multimedia transmission through power allocation in SLNR-precoding-based MISO downlink systems
作者：Zhao, Kai ;Zhang, Haixia ;Yuan, Dongfeng
作者机构：[Zhao, Kai ;Zhang, Haixia ;Yuan, Dongfeng ] Wireless Mobile Communication and Transmission Lab., School of Information Science and Engineering, Shando 更多
会议名称：2012 IEEE 14th International Conference on Communication Technology, ICCT 2012
会议日期：9 November 2012 through 11 November 2012
来源：International Conference on Communication Technology Proceedings, ICCT
关键词：multiuser multimedia transmission; Power allocation; signal to leakage noise ratio (SLNR) precoding
摘要：Transmission of the multimedia video streaming has been an important topic in wireless communications. As a metric of video quality at the application layer, peak signal-to-noise ratio (PSNR) is affected by the capacity at the physical layer which can be improved by power controlling and precoding. This paper investigates an optimal power allocation scheme which can maximize the sum PSNR of all users in an SLNR-precoding-based multiuser multiple input single output (MISO) system. The power allocation problem can be transformed into a convex optimization problem when the system works in the high signal to interference plus noise ratio (SINR) region. Performance of the proposed power allocation scheme is evaluated through computer simulation. Results show that, when the system works in the high SINR region, performance improvement in terms of sum PSNR through power allocation is neglectable while the effects of different precoding schemes on the sum PSNR performance are obvious. © 2012 IEEE.