報告題目：混合毫米波系統(tǒng)的多用戶預(yù)編碼與信道估計
Multi-user Precoding and Channel Estimation for Hybrid
Millimeter Wave Systems
報告人：Jinhong Yuan教授
邀請人：黃愛萍講師
報告時間：5月9日下午15：00-17：00
報告地點：航海大樓201會議室
內(nèi)容簡介：
我們提出了一種在射頻（RF）鏈的數(shù)目遠小于在每個收發(fā)器上配備的天線的數(shù)目條件下，用于混合毫米波（毫米波）系統(tǒng)的低復(fù)雜度信道估計算法，。該算法首先利用多頻音調(diào)來估計基站和用戶端的最強到達角，用以設(shè)計模擬波束形成矩陣。然后，所有用戶沿著估計得到的最強到達角的方向向基站發(fā)送正交導(dǎo)頻碼元，以便于進行估計信道。估計的信道信息將用于設(shè)計多用戶下行傳輸?shù)幕緮?shù)字迫零預(yù)編碼器。我們提出的信道估計算法適用于非稀疏和稀疏的毫米波信道環(huán)境。
此外，我們基于所提出的信道估計算法方案推導(dǎo)出一個可實現(xiàn)的數(shù)字迫零預(yù)編碼的上界。理論分析和仿真結(jié)果表明，當每個收發(fā)器上的射頻鏈數(shù)等于天線數(shù)時，該方案獲得了相當大的全數(shù)字系統(tǒng)的傳輸率。考慮到各種錯誤的影響，包括隨機相位誤差、收發(fā)信機模擬波束形成誤差和等效信道估計誤差等，我們證明了所提出的信道估計和多用戶下行鏈路預(yù)編碼方案對系統(tǒng)缺陷的魯棒性。
In this paper, we develop a low-complexity channel estimation for hybrid millimeter wave (mmWave) systems, where the number of radio frequency (RF) chains is much less than the number of antennas equipped at each transceiver. The proposed mmWave channel estimation algorithm first exploits multiple frequency tones to estimate the strongest angle-of-arrivals (AoAs) at both base station (BS) and user sides for the design of analog beamforming matrices. Then all the users transmit orthogonal pilot symbols to the BS along the directions of the estimated strongest AoAs in order to estimate the channel. The estimated channel will be adopted to design the digital zero-forcing (ZF) precoder at the BS for the multi-user downlink transmission. The proposed channel estimation algorithm is applicable to both nonsparse and sparse mmWave channel environments. Furthermore, we derive a tight achievable rate upper bound of the digital ZF precoding with the proposed channel estimation algorithm scheme. Our analytical and simulation results show that the proposed scheme obtains a considerable achievable rate of fully digital systems, where the number of RF chains equipped at each transceiver is equal to the number of antennas. Besides, by taking into account the effect of various types of errors, i.e., random phase errors, transceiver analog beamforming errors, and equivalent channel estimation errors, we derive a closedform approximation for the achievable rate of the considered scheme. We illustrate the robustness of the proposed channel estimation and multi-user downlink precoding scheme against the system imperfection
報告人：
Jinhong Yuan教授于1991和1997獲得北京理工大學(xué)電子工程學(xué)士學(xué)位和博士學(xué)位。1997至1999年間，擔任澳大利亞悉尼大學(xué)電氣工程學(xué)院的研究員。2000年，加入了澳大利亞悉尼新南威爾士大學(xué)的電氣工程和電信學(xué)院擔任教授。他出版了兩本書，三章書，300多篇電訊期刊和會議記錄論文，40份工業(yè)報告。他是MIMO系統(tǒng)的一項專利和低密度奇偶校驗碼的兩項專利的共同發(fā)明者。他合著了三項最佳論文獎和一項最佳海報獎，其中包括2011在墨西哥坎昆舉行的ieee無線通信和網(wǎng)絡(luò)會議的最佳論文獎，以及2007在挪威特隆赫姆舉行的ieee無線通信系統(tǒng)國際研討會的最佳海報獎。他是IEEE研究員，目前是IEEE Transactions on Wireless Communications的副編輯。他在2011至2014年間擔任IEEE NSW聯(lián)合通信/信號處理/海洋工程分會主席，并在2012至2017年間擔任IEEE Transactions on Communications副編輯。他目前的研究領(lǐng)域包括差錯控制編碼和信息論、通信理論和無線通信。
Jinhong Yuan received the B.E. and Ph.D. degrees in electronics engineering from the Beijing Institute of Technology, Beijing, China, in 1991 and 1997, respectively. From 1997 to 1999, he was a Research Fellow with the School of Electrical Engineering, University of Sydney, Sydney, Australia. In 2000, he joined the School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia, where he is currently a Telecommunications Professor with the School. He has published two books, three book chapters, over 300 papers in telecommunications journals and conference proceedings, and 40 industrial reports. He is a co-inventor of one patent on MIMO systems and two patents on low-density-parity-check codes. He has co-authored three Best Paper Awards and one Best Poster Award, including the Best Paper Award from the IEEE Wireless Communications and Networking Conference, Cancun, Mexico, in 2011, and the Best Paper Award from the IEEE International Symposium on Wireless Communications Systems, Trondheim, Norway, in 2007. He is an IEEE Fellow and currently serving as an Associate Editor for the IEEE Transactions on Wireless Communications. He served as the IEEE NSW Chair of Joint Communications/Signal Processions/Ocean Engineering Chapter during 2011-2014 and an Associate Editor for the IEEE Transactions on Communications during 2012-2017. His current research interests include error control coding and information theory, communication theory, and wireless communications.
