Journal ArticleDOI
Likelihood Ascent Search Detection for Coded Massive MU-MIMO Systems to Mitigate IAI and MUI
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TLDR
The proposed work presents joint SVD precoding and LAS MUD to mitigate both IAI and MUI and can achieve a near-optimal performance with smaller number of matrix computations.Abstract:
The main aim of massive multiuser multiple-input multiple-output (MU-MIMO) system is to improve the throughput and spectral efficiency in 5G wireless networks. The performance of MU-MIMO system is severely influenced by inter-antenna interference (IAI) and multiuser interference (MUI). The IAI occurs due to space limitations at each user terminal (UT) and the MUI is added when one UT is in the vicinity of another UT in the same cellular network. IAI can be mitigated through a precoding scheme such as singular value decomposition (SVD), and MUI is suppressed by an efficient multiuser detection (MUD) schemes. The maximum likelihood (ML) detector has optimal performance; however, it has a highly complex structure and involves the need of a large number of computations especially in massive structures. Thus, the neighborhood search-based algorithm such as likelihood ascent search (LAS) has been found to be a better alternative for mitigation of MUI as it results in near optimal performance with low complexity. Most of the recent papers are aimed at eliminating either MUI or IAI, whereas the proposed work presents joint SVD precoding and LAS MUD to mitigate both IAI and MUI. The proposed scheme can achieve a near-optimal performance with smaller number of matrix computations.read more
Citations
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Journal ArticleDOI
Low-complexity sphere decoding for MIMO-SCMA systems
Journal ArticleDOI
Design of Large Scale MU-MIMO System with Joint Precoding and Detection Schemes for Beyond 5G Wireless Networks
TL;DR: The lattice reduction (LR) precoding based user level local likelihood ascent search (ULAS) detection scheme is proposed in this paper for efficient signal detection in large scale MU-MIMO system.
Proceedings ArticleDOI
A threshold‐based sorting algorithm for dense wireless sensor systems and communication networks
Journal ArticleDOI
Precoded Large Scale Multi‐User‐MIMO System Using Likelihood Ascent Search for Signal Detection
Precoded Large Scale Multi‐User‐MIMO System Using Likelihood Ascent Search for Signal Detection
Kala Praveen Bagadi,Ravi Kumar Cv,Mohammad Alibakhshikenari,Nagaraj Challa,Allu Rajesh,S. Aïssa,Iyad Dayoub,Francisco Falcone,Ernesto Limiti +8 more
TL;DR: In this article , a joint pre-coding and MUD, Lenstra-Lovasz (LLL) based Lattice Reduction (LR) assisted likelihood accent search (LAS) was implemented to mitigate IAI and MUI simultaneously, and the LAS algorithm is a neighborhood search-based MUD that cancels BS MUI.
References
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Journal ArticleDOI
Approximate iteration detection and precoding in massive MIMO
TL;DR: The results show that the proposal provides 27%–83% normalized mean-squared error improvement of the detection symbol vector and precoding symbol vector, and the bit-error rate is mainly controlled by soft-input soft-output Viterbi decoding when using approximate iteration methods.
Journal ArticleDOI
Performance analysis of zero-forcing-precoded scheduling system with adaptive modulation for multiuser-multiple input multiple output transmission
TL;DR: The author shows that the proposed scheduling system provides performance improvement of the average spectral efficiency over the non-scheduling system, and the diversity order of the proposed system is superior to that of the Non-Scheduling System by multi-user diversity.
Journal ArticleDOI
Sequential and Global Likelihood Ascent Search-Based Detection in Large MIMO Systems
Abhay Kumar Sah,A.K. Chaturvedi +1 more
TL;DR: A metric and a few selection rules to decide whether or not to include a vector in the neighborhood are proposed and used for generating a reduced neighborhood set, which is used to reduce the complexity of the existing algorithms while maintaining their error performance.
Journal ArticleDOI
Dynamic spatial modulation for next generation networks
TL;DR: Through extensive simulations under various channel conditions and complexity analysis, it is shown that proposed OWMMSE-CML detection scheme offers performance nearer to optimal ML and also outperforms suboptimal signal vector based minimum mean square error (SVMMSE) detection scheme with a significant reduction in computational complexity.
Journal ArticleDOI
Semidefinite further relaxation on likelihood ascent search detection algorithm for high-order modulation in massive MIMO system
Lin Li,Weixiao Meng,Cheng Li +2 more
TL;DR: An improved semidefinite further relaxation detector (SFRD) is developed, which is proved to be convex and has solutions within polynomial complexity time and is an effective method for high-order QAM signal detection in massive MIMO system.
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