EARS: Millimeter Wave Massive MIMO: A New Frontier for Enhanced Radio Access

EARS：毫米波大规模 MIMO：增强无线电接入的新领域

基本信息

批准号：
1547155
负责人：
Arnold Swindlehurst
金额：
$ 63.3万
依托单位：
University of California-Irvine
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-09-01 至 2019-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1547155&HistoricalAwards=false
关键词：
EARS Millimeter Wave Massive MIMO

项目摘要

It is estimated that there are more wireless devices in use today than people on the planet. This explosive growth has created a capacity crisis for mobile operators whose impact goes well beyond the inconveniences experienced by casual users. Wireless communication is now a commodity, like roads, water, and electricity, on which the nation's economic development and government services rely. Emergency services, medical information systems, environmental monitoring, smart-grid energy distribution, smart transportation systems - all of these technologies depend on reliable access to high speed broadband wireless. It is clear that dramatic improvements in spectral access and capacity will be needed soon to accommodate the multitude of users who need broadband services anytime, anywhere. This proposal aims to address this critical need by determining how to harness potential gains from three new technologies: (1) the use of very high frequency bands, 10-20 times higher than those used in today's wireless networks, (2) decreasing the size of wireless "cells" to allow frequencies to be reused in a more dense fashion, and (3) the adoption of massive arrays of hundreds of antennas in order to handle the inevitable increase in interference and need for user selectivity. There appears to be considerable symbiosis among these new technologies that could potentially be exploited to achieve transformative gains in network speed and connectivity - increasing them by a factor of 1000 - although numerous challenges would have to first be vercome. Given the ubiquitous need for improved broadband access in industry, government, medicine and the home, the progress made by this research in overcoming these challenges will have a broad impact on all walks of life. A potential remedy for the shortage of spectrum is the use of millimeter wave frequency bands, which offer significantly more bandwidth than today's systems. Other approaches for increasing wireless capacity are also rekindling interest in the potential use of millimeter wave frequencies for cellular communications, such as using pico- and femto-cells with ranges on the order of 10-200 meters to increase frequency reuse, and the idea of basestations equipped with a very large number of antennas that can simultaneously accommodate many co-channel users, an idea referred to as massive multi-input multi-output wireless. These ideas work well in combination with each other: smaller cells are attractive for operation at millimeter wave frequencies where radio frequency path loss is significantly higher, the shorter wavelength associated with higher frequencies is appealing for massive multi-input multi-output wireless designs since the physical dimensions of the antenna array and associated electronics are reduced, the large beamforming gains achievable with very large antenna arrays can extend coverage to help overcome the high millimeter wave path loss, and the reduction in channel coherence time at millimeter wave frequencies is offset by the lower mobility and hence the higher channel coherence bandwidth due to operation in small cells. If the individual gains in capacity offered by these approaches could be achieved in combination with one another, then one could envision realizing the orders-of-magnitude increases in throughput that are predicted to be required in coming years. The goal of this proposal is to investigate the feasibility implementing a millimeter wave massive multi-input multi output system incorporating in excess of 100 antennas, addressing issues associated with millimeter wave signal propagation, communication system design, the impact of communication and signal processing requirements on the hardware design, and how practical hardware limitations affect achievable performance. Ultimately, this research effort will demonstrate the degree to which millimeter wave small-cell massive multi-input multi-output wireless systems can achieve their potential for dramatically enhanced access to the radio spectrum. No prior work has fully addressed the interdisciplinary issues associated with implementing a complete millimeter wave massive multi-input multi-output wireless transceiver, covering crucial aspects such as the impact of antenna array geometries, demodulation, baseband processing, sampling and multichannel data aggregation. Prior efforts have been restricted to scenarios with a small number of antennas, lower frequencies, or hybrid architectures in which full beamforming flexibility is not available. There are many interdisciplinary challenges that must be addressed before a system that jointly exploits millimeter wave frequencies, massive multi-input multi-output wireless and small cells could be analyzed and its potential for providing enhanced spectrum access quantified. The enormous gains in capacity and spectral efficiency that could be provided by a millimeter wave massive multi-input multi-output wireless system could have a revolutionary effect on wireless applications. This impact includes not only consumer applications, but those involving emergency services, medical information systems, environmental monitoring, smart-grid energy distribution, smart transportation systems - all technologies that rely on access to high-speed broadband wireless services.

据估计，当今使用的无线设备比地球上的人口还要多。这种爆炸式增长给移动运营商带来了容量危机，其影响远远超出了临时用户所经历的不便。无线通信现在已经像道路、水、电一样成为国家经济发展和政府服务所依赖的商品。紧急服务、医疗信息系统、环境监测、智能电网能源分配、智能交通系统——所有这些技术都依赖于高速宽带无线的可靠接入。显然，很快就需要大幅改进频谱接入和容量，以满足随时随地需要宽带服务的众多用户的需求。该提案旨在通过确定如何利用三种新技术的潜在收益来满足这一关键需求：(1) 使用非常高的频段，比当今无线网络中使用的频段高 10-20 倍，(2) 减小尺寸(3) 采用由数百个天线组成的大规模阵列，以应对不可避免的干扰增加和用户选择性的需求。这些新技术之间似乎存在相当大的共生关系，有可能被用来实现网络速度和连接性的变革性收益——将其提高 1000 倍——尽管首先必须克服众多挑战。鉴于工业、政府、医疗和家庭普遍需要改善宽带接入，这项研究在克服这些挑战方面取得的进展将对各行各业产生广泛影响。解决频谱短缺的一个潜在办法是使用毫米波频段，它比当今的系统提供更多的带宽。其他增加无线容量的方法也重新激发了人们对毫米波频率在蜂窝通信中的潜在使用的兴趣，例如使用范围为 10-200 米的微微蜂窝和毫微微蜂窝来增加频率复用，以及配备大量天线的基站可以同时容纳许多同信道用户，这种想法被称为大规模多输入多输出无线。这些想法相互结合起来效果很好：较小的单元对于在毫米波频率下运行很有吸引力，因为毫米波频率的射频路径损耗明显更高，与较高频率相关的较短波长对于大规模多输入多输出无线设计很有吸引力，因为天线阵列和相关电子设备的物理尺寸减小，通过非常大的天线阵列实现的大波束成形增益可以扩大覆盖范围，以帮助克服高毫米波路径损耗，并且毫米波频率下信道相干时间的减少被流动性较低，因此较高由于在小蜂窝中运行而导致的信道相干带宽。如果这些方法所提供的容量收益可以相互结合来实现，那么人们就可以预见未来几年预计所需的吞吐量将实现数量级的增长。该提案的目标是研究实施包含超过 100 个天线的毫米波大规模多输入多输出系统的可行性，解决与毫米波信号传播、通信系统设计、通信和信号处理要求对系统的影响相关的问题。硬件设计，以及实际的硬件限制如何影响可实现的性能。最终，这项研究工作将证明毫米波小型蜂窝大规模多输入多输出无线系统能够在多大程度上发挥其潜力，从而显着增强对无线电频谱的访问。之前的工作还没有完全解决与实现完整毫米波大规模多输入多输出无线收发器相关的跨学科问题，涵盖天线阵列几何形状的影响、解调、基带处理、采样和多通道数据聚合等关键方面。先前的努力仅限于天线数量较少、频率较低或混合架构的场景，在这些场景中，无法获得完整的波束成形灵活性。在分析联合利用毫米波频率、大规模多输入多输出无线和小型蜂窝的系统并量化其提供增强频谱接入的潜力之前，必须解决许多跨学科的挑战。毫米波大规模多输入多输出无线系统在容量和频谱效率方面的巨大提升可能会对无线应用产生革命性的影响。这种影响不仅包括消费者应用，还包括涉及紧急服务、医疗信息系统、环境监测、智能电网能源分配、智能交通系统的应用——所有这些技术都依赖于高速宽带无线服务。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Reduced Dimension Minimum BER PSK Precoding for Constrained Transmit Signals in Massive MIMO

大规模 MIMO 中受限发射信号的降维最小 BER PSK 预编码

DOI：
10.1109/icassp.2018.8461642
发表时间：
2018-11-30
期刊：
2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
影响因子：
0
作者：
A. L. Swindlehurst;H. Jedda;I. Fijalkow
通讯作者：
I. Fijalkow

Quantized Constant Envelope Precoding With PSK and QAM Signaling

使用 PSK 和 QAM 信令的量化恒定包络预编码