Variational Inference-Based Frequency-Domain Equalization for Faster-Than-Nyquist Signaling in Doubly Selective Channels

被引：32

作者：

Yuan, Weijie ^{[1
]}

Wu, Nan ^{[1
]}

Wang, Hua ^{[1
]}

Kuang, Jingming ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China

来源：

IEEE SIGNAL PROCESSING LETTERS | 2016年 / 23卷 / 09期

基金：

美国国家科学基金会; 国家高技术研究发展计划(863计划);

关键词：

Doubly selective channel (DSC); faster-than-Nyquist (FTN) signaling; frequency-domain equalization (FDE); variational inference; LOW-COMPLEXITY EQUALIZATION; OFDM;

D O I：

10.1109/LSP.2016.2593058

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This work deals with frequency-domain equalization for faster-than-Nyquist (FTN) signaling in doubly selective channels (DSCs). To handle the interference of frequency-domain symbols, the minimum mean square error (MMSE) equalizer involves high complexity in DSCs. To overcome the problem, we propose low-complexity receivers based on two variational methods, i.e., mean field (MF) and Bethe approximations. Compared with the MF method, the Bethe approximation takes into account the conditional dependencies of pairwise symbols. By only considering a small set of the frequency-domain symbols that have strong interference to each other, the complexity of the proposed algorithms increases linearly with the block length. Simulation results demonstrate that the proposed algorithms for FTN signaling are able to perform close to the MMSE equalizer in DSCs while with significantly reduced computational complexity.

引用

页码：1270 / 1274

页数：5

共 23 条

[1] Faster-Than-Nyquist Signaling [J].

Anderson, John B. ;

Rusek, Fredrik ;

Owall, Viktor .

PROCEEDINGS OF THE IEEE, 2013, 101 (08) :1817-1830

[2]

[Anonymous], 2001, ADV MEAN FIELD METHO

[3] Time-varying FIR equalization for doubly selective channels [J].

Barhumi, I ;

Leus, G ;

Moonen, M .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2005, 4 (01) :202-214

[4] Adaptive Linear Turbo Equalization Over Doubly Selective Channels [J].

Choi, Jun Won ;

Riedl, Thomas J. ;

Kim, Kyeongyeon ;

Singer, Andrew C. ;

Preisig, James C. .

IEEE JOURNAL OF OCEANIC ENGINEERING, 2011, 36 (04) :473-489

[5] On MAP symbol detection for ISI channels using the Ungerboeck observation model [J].

Colavolpe, G ;

Barbieri, A .

IEEE COMMUNICATIONS LETTERS, 2005, 9 (08) :720-722

[6] EM-Based Joint Channel Estimation and Detection for Frequency Selective Channels Using Gaussian Message Passing [J].

Guo, Qinghua ;

Huang, Defeng .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2011, 59 (08) :4030-4035

[7]

Guo QH, 2009, IEEE T WIREL COMMUN, V8, P4340, DOI [10.1109/TWC.2009.081448, 10.1109/TWC.2009.0181448]

[8] Low Complexity Equalization for Doubly Selective Channels Modeled by a Basis Expansion [J].

Hrycak, Tomasz ;

Das, Saptarshi ;

Matz, Gerald ;

Feichtinger, Hans G. .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2010, 58 (11) :5706-5719

[9] The Effect of Signaling Rate on Information Rate for Single Carrier Linear Transmission Systems [J].

Kapetanovic, Dzevdan ;

Rusek, Fredrik .

IEEE TRANSACTIONS ON COMMUNICATIONS, 2012, 60 (02) :421-428

[10] BETHE LATTICE AND BETHE APPROXIMATION [J].

KATSURA, S ;

TAKIZAWA, M .

PROGRESS OF THEORETICAL PHYSICS, 1974, 51 (01) :82-98

← 1 2 3 →