行健讲坛学术讲座

第391期

时间:   2019年5月20日（周一）上午10:00-11:00

地点:   校本部东区通信实验楼B202室

讲座:  毫米波通信中的波束对准

Beam alignment in mm-wave communications

演讲者: prof. Stephen Hanly澳洲麦考瑞大学

Abstract: Swift and accurate alignment of transmitter (Tx) and receiver (Rx) beams is one of the fundamental design challenges to enable reliable outdoor millimeter-wave communications. In this talk, we introduce a new Optimized Two-Stage Search algorithm for Tx-Rx beam alignment via spatial scanning.

In contrast to one-shot exhaustive search, OTSS judiciously divides the training energy budget into two stages. In the first stage, OTSS explores and trains all candidate beam pairs and then eliminates a set of less favorable pairs learned from the received signal profile. In the second stage, OTSS takes an extra measurement for each of the survived pairs and combines with the previous measurement to determine the best one. For OTSS, we derive an upper bound on its misalignment probability, under a single-path channel model with training codebooks having an ideal beam pattern. We also characterize the decay rate function of the upper bound with respect to the training budget and further derive the optimal design parameters of OTSS that maximize the decay rate. OTSS is proved to asymptotically outperform state-of-the-art baselines, and its advantage is also numerically confirmed for limited training budget and with ideal or practically synthesized beams.

Biography: Stephen Hanly is a Professor of Engineering at Macquarie University in Sydney, Australia. He has a PhD from Cambridge University, and has worked at a number of universities and in industry, including the University of Melbourne and the National University of Singapore. He has won a number of best paper awards and is a Fellow of the IEEE. His research interests are in wireless communications and information theory. He is a Member of the Board of Governors of the IEEE Information Theory Society.

邀请人：上海大学通信与信息工程学院  陈小静老师

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