Proceedings Article10.1109/WCSP.2016.7752536
Design of low-complexity vector perturbation precoding technique for multiuser MIMO systems
Jingwen Yang,Xiangyang Wang,Shuo Chen,Zhongyuan Zhong +3 more
- 01 Oct 2016
pp 1-5
1
TL;DR: In order to overcome the shortcoming that multiuser interference (MUI) will be suppressed completely by BD-VP becauce it do not considering the noise, generalized MMSE channel inversion VP (GMI-VP) algorithms are proposed, which much superior toBD-VP algorithm.
read more
Abstract: Block diagonalization (BD) is a famous conditional precoding algorithm in multi-input multi-output (MIMO) broadcast systems, vector perturbation (VP) and BD are combined which named as BD-VP for short and the receivers' complexity can be reduced by VP at the transmmiter. Furthermore, the performance of BD-VP in diversity is comparable because the maximum likehood (ML) method is involved. However, in order to overcome the shortcoming that multiuser interference (MUI) will be suppressed completely by BD-VP becauce it do not considering the noise, generalized MMSE channel inversion VP (GMI-VP) algorithms are proposed, which much superior to BD-VP algorithm. When increasing the number of users, sphere decoding's complexity used in VP increases with exponential trend and limit VP's practical application. In this paper, low-complexity BD/GMI-VP precoding algorithms using lattice reduction (LR-BD/GMI-VP) are proposed. Analysis and Monte Carlo simulation data reveal that the proposed algorithms help to decrease the computational complexity remarkably, especially when there are a great many users, this advantage is obtained with merely a bit SER loss which can be neglected in high SNR.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Hybrid TH-VP Precoding for Multiuser MIMO
TL;DR: This paper presents the hybrid Tomlinson–Harashima VP (TH-VP) algorithm, a novel zero-forcing precoding scheme, which combines TH precoding to remove interuser interference, and VP precode to equalize each user's multiple spatial streams and shows that the two nonlinear techniques can be integrated in a single optimization.
References
Factoring Polynomials with Rational Coefficients
TL;DR: This paper presents a polynomial-time algorithm to solve the following problem: given a non-zeroPolynomial fe Q(X) in one variable with rational coefficients, find the decomposition of f into irreducible factors in Q (X).
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels
TL;DR: While the proposed algorithms are suboptimal, they lead to simpler transmitter and receiver structures and allow for a reasonable tradeoff between performance and complexity.
Factoring polynomials with rational coeficients
H.W. Lenstra,A.K. Lenstra,L. Lovfiasz +2 more
- 01 Jan 1982
TL;DR: In this paper, a polynomial-time algorithm was proposed to decompose a primitive polynomials into irreducible factors in Z(X) if the greatest common divisor of its coefficients is 1.
On the achievable throughput of a multiantenna Gaussian broadcast channel
Giuseppe Caire,Shlomo Shamai +1 more
TL;DR: Under certain mild conditions, this scheme is found to be throughput-wise asymptotically optimal for both high and low signal-to-noise ratio (SNR), and some numerical results are provided for the ergodic throughput of the simplified zero-forcing scheme in independent Rayleigh fading.
2.8K