Optimizing Multiuser Multimedia Transmission Through Power Allocation in SLNR-precoding-based MISO Downlink Systems
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-precodingbased 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.
Power allocation signal to leakage noise ratio (SLNR) precoding multiuser multimedia transmission
Kai Zhao Haixia Zhang Dongfeng Yuan
Wireless Mobile Communication and Transmission Lab.School of Information Science and Engineering Shandong University, Jinan, China
国际会议
2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))
成都
英文
632-637
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）