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Approaching MIMO channel capacity with soft detection based on hard sphere decoding

Renqiu Wang, G.B. Giannakis
2006 IEEE Transactions on Communications  
We corroborate our near-optimal soft detection (SoD) algorithms based on HSD (SoD-HSD) with simulations.  ...  Index Terms-Multi-input multi-output (MIMO) detection, soft decoding, sphere decoding, turbo decoding.  ...  Zhao of Qualcomm for helpful discussions on this and related topics.  ... 
doi:10.1109/tcomm.2006.873064 fatcat:wisksjgne5acnltjssfwn47aqe

Mimo Communication System At A Glance

Mrs. Divya
2012 IOSR Journal of Electronics and Communication Engineering  
Firstly it discusses ergodic and the outage capacity for both schemes when Channel State Information is known and not known at the transmitter of a MIMO channel then it discusses space-time codes for maximization  ...  Their use makes it possible to achieve higher capacity of the channel as well as increased data rates order of magnitudes than the conventional Single Input Single Output (SISO) communication systems.  ...  Fig5. 2-D representation of Sphere Decoding algorithm There are two variants of the sphere decoder algorithm one is hard output which is based on hard decision as a function of the input and the other  ... 
doi:10.9790/2834-0111217 fatcat:rsftgnmd7vccvkjit5cdcg3oxm

Capacity-based performance comparison of MIMO-BICM demodulators

Peter Fertl, Joakim Jalden, Gerald Matz
2008 2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications  
Based on this approach, we conclude that a universal ranking of MIMO (soft and hard) demodulation algorithms is not possible.  ...  We propose to use the capacity of an equivalent "modulation" channel as a performance measure that has the advantage of not depending on the outer error correcting code.  ...  An exact implementation of the max-log MAP detector based on sphere decoding was presented in [5] .  ... 
doi:10.1109/spawc.2008.4641591 fatcat:wz6njgdm2rd2ndehkxzewl3yya

Semi-blind iterative joint channel estimation and K-Best Sphere Decoding for MIMO

I. Dey, G. G. Messier, S. Magierowski, Sheng Chen
2013 2013 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)  
The proposed scheme is capable of approaching the ideal detection performance obtained with the perfect MIMO channel state information.  ...  An efficient and high-performance semi-blind scheme is proposed for Multiple-Input Multiple-Output (MIMO) systems by iteratively combining channel estimation with K-Best Sphere Decoding (SD).  ...  K-Best sphere decoding performance with K = 4, and hard-decision Viterbi decoding has been compared with list sphere decoding with K = 4 and K = 40, and APP soft-decision decoding.  ... 
doi:10.1109/pacrim.2013.6625445 fatcat:5hxtqou43vdwfdybxnfe3qtxjq

Performance Assessment of MIMO-BICM Demodulators based on System Capacity [article]

Peter Fertl, Joakim Jalden, Gerald Matz
2010 arXiv   pre-print
We provide a comprehensive performance comparison of soft-output and hard-output demodulators in the context of non-iterative multiple-input multiple-output bit-interleaved coded modulation (MIMO-BICM)  ...  This motivates us to propose a code-independent performance measure in terms of system capacity, i.e., mutual information of the equivalent modulation channel that comprises modulator, wireless channel  ...  Efficient exact implementations of the max-log MAP detector based on sphere decoding have been presented in [8] - [10] .  ... 
arXiv:0903.2711v2 fatcat:t7isxs6l7fhtpe6fbosr3xzt7m

Distributed Punctured Ldpc Coding Scheme Using Novel Shuffled Decoding For Mimo Relay Channels

Satoshi Goto, Yichao Lu, Xiao Peng, Nanfan Qiu
2012 Zenodo  
We assume that perfect channel knowledge is known at the receiver, but unknown at the transmitter. Here we use an iterative MIMO sphere detector to decode MIMO signals.  ...  Compared with decode-and-forward protocol, the proposed soft information relaying method uses soft bits instead of making hard decisions to provide additional information.  ... 
doi:10.5281/zenodo.43024 fatcat:ixxv7xricfewxij2kii5iudzmm

Deep Learning for Joint MIMO Detection and Channel Decoding [article]

Taotao Wang, Lihao Zhang, Soung Chang Liew
2019 arXiv   pre-print
Conventional MIMO receivers adopt a model-based approach for MIMO detection and channel decoding in linear or iterative manners.  ...  We propose a deep-learning approach for the joint MIMO detection and channel decoding problem.  ...  However, this deep-learning MIMO detection scheme can only perform hard MIMO detection and cannot be combined with a soft channel decoding scheme.  ... 
arXiv:1901.05647v1 fatcat:q5h3f6glxfcxheljkek7b63qse

Soft Sphere Detection with Bounded Search for High-Throughput MIMO Receivers

Predrag Radosavljevic, Joseph R. Cavallaro
2006 2006 Fortieth Asilomar Conference on Signals, Systems and Computers  
1 We propose a soft sphere detection algorithm where search-bounds are determined based on the distribution of candidates found inside the sphere for different search levels.  ...  The estimated hardware cost is lower than the hardware cost of other soft sphere detectors from the literature, while high detection throughput per channel use is achieved.  ...  This scheme operates close to channel capacity if iteratively interfaced with outer decoding.  ... 
doi:10.1109/acssc.2006.354940 fatcat:tndga25yb5c73ndfspofxvaggu

Near-capacity joint channel estimation and three-stage turbo detection for MIMO systems

Peichang Zhang, Sheng Chen, Lajos Hanzo
2013 2013 IEEE Wireless Communications and Networking Conference (WCNC)  
We propose a novel joint channel estimation and three-stage iterative detection/decoding scheme for near-capacity MIMO systems.  ...  In our scheme, as usual, the detected soft information is first exchanged a number of times within the inner turbo loop between the unity-rate-code (URC) decoder and the MIMO soft-demapper, and the information  ...  and hard-decision aided channel estimators, respectively, based on the entire detected data sequence.  ... 
doi:10.1109/wcnc.2013.6555214 dblp:conf/wcnc/Zhang0H13 fatcat:ywbl26jtwndmppz7sbw4ildmhe

Low complexity soft detection for spatially multiplexed BICM MIMO OFDM system

Rizwan Ghaffar, Raymond Knopp
2009 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications  
This paper presents a new approach to soft detection of spatial data streams in multiple input multiple output (MIMO) channels in slow fading channels.  ...  We propose a detection algorithm based on a combination of linear and non linear detection techniques.  ...  The detection is based on segregating the streams into two groups based on their post detection SNR.  ... 
doi:10.1109/spawc.2009.5161794 fatcat:7qzz4reyq5hxtbjafkaredmi3e

Algorithm and implementation of the K-best sphere decoding for MIMO detection

Zhan Guo, P. Nilsson
2006 IEEE Journal on Selected Areas in Communications  
The proposed hard-output KSE decoder and the soft-output MKSE decoder is implemented for 4 4 16-quadrature amplitude modulation (QAM) MIMO detection in a 0.35-m and a 0.13-m CMOS technology, respectively  ...  K-best Schnorr-Euchner (KSE) decoding algorithm is proposed in this paper to approach near-maximum-likelihood (ML) performance for multiple-input-multiple-output (MIMO) detection.  ...  Liu (IMEC, Belgium) for the generous help on the soft-output decoding simulations. They would also like to thank A.  ... 
doi:10.1109/jsac.2005.862402 fatcat:effuoan7irbvppsm6k5xxplbg4

Parallel soft spherical detection for coded MIMO systems

H. Nikopour, A.K. Khandani, A. Saleh
2006 IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006.  
The proposed detector searches inside a given sphere in a parallel manner to simultaneously find a list of m-best points based on an additive metric.  ...  A sub-optimum a-posteriori probability (APP) detector is proposed for iterative joint detection/decoding in a multiple-input multiple-output (MIMO) wireless communication system employing an outer code  ...  Soft-to-hard transformation is another approach [24] to build a soft detector.  ... 
doi:10.1109/wcnc.2006.1696557 dblp:conf/wcnc/NikopourKS06 fatcat:eujv4ytedfb5rgzpot4hbj72e4

Embedded Iterative Semi-Blind Channel Estimation for Three-Stage-Concatenated MIMO-Aided QAM Turbo Transceivers

Peichang Zhang, Sheng Chen, Lajos Hanzo
2014 IEEE Transactions on Vehicular Technology  
We propose a semi-blind joint CE and three-stage iterative detection/decoding scheme for near-capacity MIMO systems.  ...  Most significantly, the mean square error of our DD channel estimator approaches the Cramér-Rao lower bound associated with the optimal training based CE, while the bit error rate of our semi-blind scheme  ...  Consequently, these joint soft-decision based CE and turbo detection/decoding schemes are capable of achieving better overall system-performance than their hard-decision based counterparts.  ... 
doi:10.1109/tvt.2013.2271872 fatcat:24zhexgtnbfkpiipbrq336hdwe

Antipodal Detection and Decoding for Large Multi-User MIMO with Reduced Base-Station Antennas

Christopher Husmann, Rahim Tafazolli, Konstantinos Nikitopoulos
2018 2018 IEEE Globecom Workshops (GC Wkshps)  
Sphere decoding (SD) can achieve this, but its complexity and latency becomes impractical for large MIMO systems.  ...  and LDPC decoding with similar complexity requirements.  ...  Antipodal detection and decoding is based on a simple observation.  ... 
doi:10.1109/glocomw.2018.8644235 dblp:conf/globecom/HusmannTN18 fatcat:nvs7lbv2kjfyniipwcqovhib5y

A 772Mbit/s 8.81bit/nJ 90nm CMOS soft-input soft-output sphere decoder

Filippo Borlenghi, Ernst Martin Witte, Gerd Ascheid, Heinrich Meyr, Andreas Burg
2011 IEEE Asian Solid-State Circuits Conference 2011  
MIMO detector and the channel decoder.  ...  Multiple-input multiple-output (MIMO) wireless transmission can approach its full potential in terms of spectral efficiency only with iterative decoding, i.e., by exchanging soft information between the  ...  Iterative MIMO detection and decoding is the final hurdle towards approaching channel capacity [1] , [2] .  ... 
doi:10.1109/asscc.2011.6123571 dblp:conf/asscc/BorlenghiWAMB11 fatcat:f6une7rjbff3jimjaeppaycgv4
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