A Low-Complexity CLSIC-LMMSE-Based Multi-User Detection Algorithm for Coded MIMO Systems with High Order Modulation

In this work, first, a multiuser detection (MUD) algorithm based on component-level soft interference cancellation and linear minimum mean square error (CLSIC-LMMSE) is proposed, which can enhance the bit error ratio (BER) performance of the traditional SIC-LMMSE-based MUD by mitigating error propagation. Second, for non-binary low density parity check (NB-LDPC) coded high-order modulation systems, when the proposed algorithm is integrated with partial mapping, the receiver with iterative detection and decoding (IDD) achieves not only better BER performance but also significantly computational complexity reduction over the traditional SIC-LMMSE-based IDD scheme. Extrinsic information transfer chart (EXIT) analysis and numerical simulations are both used to support the conclusions.

[1]  Jungwon Lee,et al.  Successive Interference Cancellation via Rank-Reduced Maximum A Posteriori Detection , 2013, IEEE Transactions on Communications.

[2]  Sae-Young Chung,et al.  Analysis of sum-product decoding of low-density parity-check codes using a Gaussian approximation , 2001, IEEE Trans. Inf. Theory.

[3]  Emmanuel Boutillon,et al.  Complexity Comparison of Non-Binary LDPC Decoders , 2009 .

[4]  Minho Jo,et al.  A Composite LMMSE Channel Estimator for Spectrum-Efficient OFDM Transmit Diversity , 2008, KSII Trans. Internet Inf. Syst..

[5]  Inkyu Lee,et al.  Iterative detection and decoding with an improved V-BLAST for MIMO-OFDM systems , 2006, IEEE Journal on Selected Areas in Communications.

[6]  Lajos Hanzo,et al.  EXIT Charts for System Design and Analysis , 2014, IEEE Communications Surveys & Tutorials.

[7]  Stefan Nowak,et al.  High efficiency broadband transmission with LDPC codes over GF(2s) , 2011, 2011 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB).

[8]  Nam Ik Cho,et al.  Improved linear soft-input soft-output detection via soft feedback successive interference cancellation , 2010, IEEE Transactions on Communications.

[9]  Jin Xu,et al.  A Component-Level Soft Interference Cancellation Based Iterative Detection Algorithm for Coded MIMO Systems , 2014, 2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall).

[10]  Stephan ten Brink,et al.  Design of low-density parity-check codes for modulation and detection , 2004, IEEE Transactions on Communications.

[11]  Ivan J. Fair,et al.  Density Evolution for Nonbinary LDPC Codes Under Gaussian Approximation , 2009, IEEE Transactions on Information Theory.

[12]  David Declercq,et al.  Getting Closer to MIMO Capacity with Non-Binary Codes and Spatial Multiplexing , 2010, 2010 IEEE Global Telecommunications Conference GLOBECOM 2010.

[13]  Lajos Hanzo,et al.  Efficient Computation of EXIT Functions for Nonbinary Iterative Decoding , 2006, IEEE Transactions on Communications.

[14]  Henk Wymeersch,et al.  Log-domain decoding of LDPC codes over GF(q) , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[15]  Xu Jin,et al.  A Low-Complexity CLSC-LMMSE Detection Algorithm for Non-binary LDPC Coded MIMO System ⋆ , 2015 .