Optimizing Multiuser Multimedia Transmission Through Power Allocation in SLNR-precoding-based MISO Downlink Systems
会议名称：《2012 IEEE 14th International Conference on Communication Technology》
会议日期：2012年
学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统]
基 金：supported in part by the research grant from National Natural Science Foundation of China (No. 61071122, No. 60972043, No. 61172055) the Natural Science Foundation of Shandong Province (No. ZR2011FZ006)
关 键 词：Power allocation signal to leakage noise ratio (SLNR) precoding multiuser multimedia transmission.
摘 要：Transmission of the multimedia video streaming has been an important topic in wireless *** 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 *** 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） *** 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） *** of the proposed power allocation scheme is evaluated through computer *** 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.