Wireless Communication Technologies to Provide Large Increases in Spectral Efficiency

为了实现未来无线系统所需要的峰值数据速率和总数据量的增加，人们研究了新的方法和技术来极大地提高现有无线通信系统的频谱效率。以当前的长期演进(LTE)通信系统为起点，我们将研究多址接入技术的改进，大规模MIMO系统中接收天线数量增加的影响，强大而快速但保持合理计算复杂度的新的差错控制编码技术，以及多用户检测技术，以便在保持低中断概率的情况下显著提高峰值和平均数据速率。我们将在大规模MIMO系统的背景下确定MIMO-OFDM和MIMO-SC-FDMA的性能，并提出新的编码、天线选择和多用户检测技术，以提供非常高的bps/Hz频谱效率。我们将研究在SC-FDMA的频域中使用零点的新方法，以便携带额外的信息，而不是用于多址接入，目的是提高移动上行链路的功率和频谱效率。我们还将研究更节能的信道冲激响应估计技术，以减少所需的开销，进一步提高未来无线系统的频谱效率。**

New methods and techniques are studied to greatly increase the spectral efficiency of current wireless communication systems in order to achieve the increases in peak data rates and overall data volume that is needed for future wireless systems. Using current long term evolution (LTE) communication systems as a starting point, we will study modifications to the multiple access techniques, the effect of increased number of receive antennas to be used in massive MIMO systems, new error control coding techniques that are powerful and fast but maintain reasonable levels of computational complexity and multiuser detection techniques in order to increase peak and average data rates significantly while keeping outage probabilities low. We will determine the performance of MIMO-OFDM and MIMO-SC-FDMA in the context of massive MIMO systems and propose novel coding, antenna selection and multiuser detection techniques in order to provide very high spectral efficiency in bps/Hz. We will examine new ways to use the zeros in the frequency domain of SC-FDMA so as to carry additional information as opposed to or in addition to being used for multiple access in the goal to improve both the power and spectral efficiencies of mobile uplinks. We will also study more power efficient channel impulse response estimation techniques so as to reduce the amount of overhead needed, further increasing the spectral efficiency of future wireless systems. **