Transmitter Optimization for Wireless Networks

这是对无线传输路径中传输信号的自适应和稳健设计的研究。目标是确定基本的设计方法，这些方法将允许以比目前通过自适应地绘制发射信号轮廓以匹配信道条件而实现的数据速率快数倍的数据速率进行可靠传输。时变和/或广播无线传输路径为这种目前尚未解决的自适应传输设计带来了特殊的挑战。该项目首先研究了固定广播信道上的传输，其中不允许向发射机反馈，需要推导出稳健信号设计的原则，以提高可靠传输的数据速率。然后，研究包括通过广播和交互时变(移动)频道的众所周知的和新的模型的时间变化。然后，重点转向多用户协调传输技术的推广。在有线信道上非常成功的多音调波形的扩展和推广将在这些新的和更具挑战性的环境中处理。

This is an investigation of the adaptive and robust design of transmit signals for wireless transmission paths. The objective is to determine fundamental design methods that will allow reliable transmission at data rates several times faster than are presently achievable by adaptively contouring the transmit signals to match channel conditions. Time-varying and/or broadcast wireless transmission paths create special challenges for such adaptive transmission design that at present have not been solved. The project first studies transmission on fixed broadcast channels where feedback to the transmitter is not allowed and principles of robust signal design need to be derived to improve reliably transmitted data rates. Study then encompasses time-variation through both well known and new models for both broadcast and interactive time-varying (mobile) channels. The focus then shifts to generalization to multiuser coordinated transmission technologies. Extension and generalization of multi-tone waveforms which are very successful on wireline channels will be treated in these new and more challenging contexts.