講座名稱：正交時(shí)頻空（OTFS）調(diào)制系列講座

講座時(shí)間：6月4日9:00

講座地點(diǎn)：北校區(qū)新科技樓1012報(bào)告廳

主辦單位：綜合業(yè)務(wù)網(wǎng)理論及關(guān)鍵技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室

報(bào)告1：A Novel Signal Waveform for High-Mobility Communications -OTFS

講座人介紹：

袁偉杰博士現(xiàn)任南方科技大學(xué)電子與電氣工程系副研究員。于2019年在澳大利亞悉尼科技大學(xué)獲博士學(xué)位，之后在新南威爾士大學(xué)擔(dān)任研究員，2021年回國(guó)加入南方科技大學(xué)電子系。曾于2016年，2018年和2019年分別在奧地利維也納技術(shù)大學(xué)、澳大利亞悉尼大學(xué)、伍倫貢大學(xué)和英國(guó)南安普頓大學(xué)從事研究工作。主要研究方向?yàn)檐嚶?lián)網(wǎng)通信、智能交通、統(tǒng)計(jì)信號(hào)處理、下一代移動(dòng)通信（6G）、網(wǎng)絡(luò)定位與跟蹤等，目前在領(lǐng)域頂級(jí)期刊和國(guó)際會(huì)議上發(fā)表學(xué)術(shù)論文50篇。擔(dān)任了多個(gè)國(guó)際學(xué)術(shù)期刊和學(xué)術(shù)會(huì)議的審稿人和技術(shù)程序委員會(huì)(TPC)成員，作為共同主席（Co-Chair）或共同組織者（Co-organizer)在IEEE ICC, VTC, SPAWC, ICCC等國(guó)際會(huì)議上組織了多項(xiàng)專題研討會(huì)和特別分會(huì)，是IEEE感知通信一體化特別興趣小組（SIG）和新興技術(shù)倡議委員會(huì)（ETI）的創(chuàng)始成員。

講座內(nèi)容：

Communications in high mobility scenarios suffer from severe Doppler spreads, which deteriorate the performance of the widely adopted orthogonal frequency division multiplexing (OFDM) modulation in the current 4G and 5G networks. Recently, a new two-dimensional modulation scheme referred to as orthogonal time frequency space (OTFS) was proposed, where the information symbols are multiplexed in the Delay-Doppler (DD) domain. OTFS provides the possibility to embrace localized delay and Doppler impairments and converts time-frequency selective channels into an invariant channel in the DD domain. More importantly, OTFS enjoys the full time-frequency diversity of the channel, which is the key to provide reliable transmissions for the future 6G and high mobility communications. This talk will unveil the fundamentals of OTFS modulation and introduce some recent advances.

報(bào)告2：OTFS Waveform for High-Mobility Communications: Window Design and Channel Estimation

講座人介紹：

魏志強(qiáng)，2012年畢業(yè)于西北工業(yè)大學(xué)航海學(xué)院信息對(duì)抗技術(shù)系，2015年獲得全額獎(jiǎng)學(xué)金赴澳大利亞新南威爾士大學(xué)無(wú)線通信專業(yè)學(xué)習(xí)，并于2019年獲得博士學(xué)位（導(dǎo)師：原進(jìn)宏教授）。2019年6月-2021年3月，他繼續(xù)在新南威爾士大學(xué)從事博士后研究工作。2021年3月，他受德國(guó)亞歷山大-洪堡基金會(huì)資助，在Friedrich-Alexander University Erlangen-Nuremberg從事博士后研究工作（導(dǎo)師：Robert Schober）。他的主要研究興趣是非正交多址接入，無(wú)人機(jī)通信，和正交時(shí)間頻率空間調(diào)制在無(wú)線通信中的系統(tǒng)方案設(shè)計(jì)及優(yōu)化。目前，他已在IEEE Journal on Selected Areas in Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Communications, IEEE Transactions on Vehicular Technology 等通信領(lǐng)域頂級(jí)期刊發(fā)表論文19篇。曾獲2018年國(guó)際通信大會(huì)“最佳論文獎(jiǎng)”（由IEEE通信學(xué)會(huì)頒發(fā)）。

講座內(nèi)容：

The sixth-generation (6G) wireless networks are envisioned to provide a global coverage for the intelligent digital society of the near future, ranging from traditional terrestrial to non-terrestrial networks, where reliable communications in high-mobility scenarios at high carrier frequencies would play a vital role. In such scenarios, the conventional orthogonal frequency division multiplexing (OFDM) modulation, that has been widely used in both the fourth-generation (4G) and the emerging fifth-generation (5G) cellular systems as well as in WiFi networks, is vulnerable to severe Doppler spread. In this context, this talk aims to introduce a recently proposed two-dimensional modulation scheme referred to as orthogonal time-frequency space (OTFS) modulation, which conveniently accommodates the channel dynamics via modulating information in the delay-Doppler domain.

報(bào)告3：Recent Advances on OTFS Modulation: Performance Analysis and Signal Detection

講座人介紹：

李雙洋，分別于2013年，2016年，以及2021年在西安電子科技大學(xué)獲得學(xué)士、碩士、以及博士學(xué)位。目前，他在新南威爾士大學(xué)從事相關(guān)研究工作（導(dǎo)師：原進(jìn)宏教授）。他的主要研究興趣是面向未來(lái)移動(dòng)通信的波形設(shè)計(jì)，以及信息與編碼理論、編碼調(diào)制技術(shù)的相關(guān)內(nèi)容。目前他已在領(lǐng)域著名期刊和國(guó)際會(huì)議上發(fā)表學(xué)術(shù)論文30余篇，并是多個(gè)領(lǐng)域頂級(jí)期刊的審稿人。李雙洋博士擔(dān)任了多個(gè)國(guó)際學(xué)術(shù)會(huì)議的審稿人并以技術(shù)程序委員會(huì) (TPC) 成員或共同主席（Co-Chair）的身份在IEEE ICC，Globecom，ICCC，ICCT等會(huì)議上參了多項(xiàng)專題研討會(huì)。

講座內(nèi)容：

Orthogonal time frequency space (OTFS) modulation has attracted substantial attention recently. It has demonstrated superior performance compared to the conventional orthogonal frequency-division multiplexing (OFDM) modulation in the high-Doppler scenarios. Therefore, it has been widely acknowledged as a potential key enabler for emerging applications, such as unmanned aerial vehicles (UAVs) and low-earth-orbit (LEO) satellites. In this presentation, we will summarize some recent advances on OTFS modulation, with a specific focus on its performance analysis with channel coding and signal detection. In particular, we will unveil the trade-off between the coding gain and diversity gain for OTFS modulation. We will also discuss how the unitary transformations between different domains, such as the time-delay domain and the delay-Doppler domain, can help the signal detection.