Precoding Optimization for Copper Line Networks

Achieving high data rates on low quality twisted pair cables under certain power and complexity constraints requires optimized physical layer transmission. This chapter discusses signal transmission in G.fast with the focus on precoding and spectrum optimization in downstream direction. The power constraints to be considered for wireline transmission are different than a sum-power constraint that is mostly used in literature, requiring a more general optimization framework. A realistic estimation of the achievable data rates under the conditions of an implementable G.fast transceiver is provided.

[1]  Khaled Ben Letaief,et al.  Multiuser OFDM with adaptive subcarrier, bit, and power allocation , 1999, IEEE J. Sel. Areas Commun..

[2]  Teng Joon Lim,et al.  Precoding for the Multiantenna Downlink: Multiuser SNR Gap and Optimal User Ordering , 2007, IEEE Transactions on Communications.

[3]  Paschalis Tsiaflakis,et al.  Sensitivity of nonlinear precoding to imperfect channel state information in G.fast , 2016, 2016 24th European Signal Processing Conference (EUSIPCO).

[4]  Wolfgang Utschick,et al.  Average sum MSE minimization in the multi-user downlink with multiple power constraints , 2014, 2014 48th Asilomar Conference on Signals, Systems and Computers.

[5]  Romeo Giuliano,et al.  Coexistence of FTTC and FTTDp network architectures in different VDSL2 scenarios , 2016, Trans. Emerg. Telecommun. Technol..

[6]  John M. Cioffi,et al.  Weighted sum-rate maximization using weighted MMSE for MIMO-BC beamforming design , 2008, IEEE Trans. Wirel. Commun..

[7]  Wolfgang Utschick,et al.  Zero-Forcing and MMSE Precoding for G.fast , 2014, GLOBECOM 2014.

[8]  Renato R. Lopes,et al.  Bit Loading for Precoded DSL Systems , 2007, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07.

[9]  Stefan Höst,et al.  Optimizing power normalization for G.fast linear precoder by linear programming , 2014, 2014 IEEE International Conference on Communications (ICC).

[10]  M. Tomlinson.  New automatic equaliser employing modulo arithmetic , 1971 .

[11]  Wei Yu,et al.  Trellis and convolutional precoding for transmitter-based interference presubtraction , 2005, IEEE Transactions on Communications.

[12]  J. Campello.  Practical bit loading for DMT , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).

[13]  Wolfgang Utschick,et al.  Implementation aspects of nonlinear precoding for G.fast — coding and legacy receivers , 2017, 2017 25th European Signal Processing Conference (EUSIPCO).

[14]  Wolfgang Utschick,et al.  Weighted MMSE Tomlinson-Harashima Precoding for G.fast , 2016, 2016 IEEE Global Communications Conference (GLOBECOM).

[15]  Max H. M. Costa,et al.  Writing on dirty paper , 1983, IEEE Trans. Inf. Theory.

[16]  Wolfgang Utschick,et al.  Achievable rates with implementation limitations for G.fast-based hybrid copper/fiber networks , 2015, 2015 IEEE International Conference on Communications (ICC).

[17]  Lee-Fang Wei,et al.  Trellis-coded modulation with multidimensional constellations , 1987, IEEE Trans. Inf. Theory.

[18]  Wei Yu,et al.  Transmitter Optimization for the Multi-Antenna Downlink With Per-Antenna Power Constraints , 2007, IEEE Transactions on Signal Processing.

[19]  Tharmalingam Ratnarajah,et al.  Interference Optimization for Transmit Power Reduction in Tomlinson-Harashima Precoded MIMO Downlinks , 2012, IEEE Transactions on Signal Processing.

[20]  John M. Cioffi,et al.  Vectored transmission for digital subscriber line systems , 2002, IEEE J. Sel. Areas Commun..

[21]  Luc Vandendorpe,et al.  Sum MSE optimization for downlink multiuser MIMO systems with per antenna power constraint: Downlink-uplink duality approach , 2011, 2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications.

[22]  Marc Moonen,et al.  Optimal Power Allocation under Per-Modem Total Power and Spectral Mask Constraints in XDSL Vector Channels with Alien Crosstalk , 2007, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07.

[23]  Wei Yu,et al.  Uplink-downlink duality via minimax duality , 2006, IEEE Transactions on Information Theory.

[24]  S. Weinstein,et al.  Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform , 1971 .

[25]  Carl J. Nuzman,et al.  Energy efficient discontinuous operation in vectored G.fast , 2014, 2014 IEEE International Conference on Communications (ICC).

[26]  Gerhard Bauch,et al.  Cholesky Factorization With Symmetric Permutation Applied to Detecting and Precoding Spatially Multiplexed Data Streams , 2007, IEEE Transactions on Signal Processing.

[27]  Josef A. Nossek,et al.  Linear transmit processing in MIMO communications systems , 2005, IEEE Transactions on Signal Processing.

[28]  Paschalis Tsiaflakis,et al.  Novel bitloading algorithms for coded G.fast DSL transmission with linear and nonlinear precoding , 2015, 2015 IEEE International Conference on Communications (ICC).

[29]  Marc Moonen,et al.  The linear zero-forcing crosstalk canceler is near-optimal in DSL channels , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[30]  M. Moonen,et al.  Linear and Nonlinear Precoding Based Dynamic Spectrum Management for Downstream Vectored G.fast Transmission , 2017, 2015 IEEE Global Communications Conference (GLOBECOM).

[31]  Wolfgang Utschick,et al.  Alternating Optimization for MMSE Broadcast Precoding , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[32]  Ami Wiesel,et al.  Zero-Forcing Precoding and Generalized Inverses , 2008, IEEE Transactions on Signal Processing.

[33]  Wolfgang Utschick,et al.  Coexistence of G.fast and VDSL in FTTDP and FTTC deployments , 2015, 2015 23rd European Signal Processing Conference (EUSIPCO).

[34]  John M. Cioffi,et al.  Vectored-DMT: a FEXT canceling modulation scheme for coordinating users , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).