Efficient Detection of OTFS Modulation

讲座名称：Efficient Detection of OTFS Modulation

讲座时间：2019-09-05 10:30:00

讲座地点：北校区新科技楼1012

讲座人：Emanuele Viterbo

讲座人介绍：

学习经历：1995年于意大利Politecnico di Torino获得博士学位。

工作经历：1995年-1997年 European Patent Office；1997年-1998年 Information Sciences Research Center of AT&T Research；1998年-2005年 Dipartimento di Elettronica, Politecnico di Torino；2006年-2009年 University of Calabria。

学术成就：1997年获得NATO Advanced Fellowship。IEEE Fellow。国际期刊IEEE TRANSACTIONS ON INFORMATION THEORY, European Transactions on Telecommunications和 Journal of Communications and Networks的副主编。国际期刊IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING 特刊Managing Complexity in Multiuser MIMO Systems的客座主编。

讲座内容：

Orthogonal time frequency space (OTFS) modulation is very effective in high Doppler channels by transmitting the information signals in the delay-Doppler domain rather than in thetime–frequency domain. Moreover, OTFS provides uniform channel gains across all the transmitted signals thus ensuring the same SNR for all input signals. In this talk, we present the explicit relation between OTFS transmit and receive signals for the delay–Doppler channel with a limited number of paths with delay and Doppler. In particular, we analyze the effect of fractional Doppler on the received signal and show how it causes inter Doppler interference (IDI). We then propose a low-complexity iterative algorithm based on message passing that effectively detects the information signals by canceling IDI. Furthermore, the message passing algorithm complexity scales linearly and can be applied to large-scale OTFS systems. Simulation results show that the OTFS with the proposed algorithm greatly outperforms the orthogonal frequency division multiplexing (OFDM) schemes in typical wireless channels.

主办单位：通信工程学院