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Matrix decomposition is one of the fundamental tools to discover knowledge from big data generated by modern applications. However, it is still inefficient or infeasible to process very big data using such a method in a single machine.…

机器学习 · 计算机科学 2020-02-11 Chihao Zhang , Yang Yang , Wei Zhang , Shihua Zhang

We introduce a novel framework for clustering a collection of tall matrices based on their column spaces, a problem we term Subspace Clustering of Subspaces (SCoS). Unlike traditional subspace clustering methods that assume vectorized data,…

机器学习 · 计算机科学 2025-09-30 Paris A. Karakasis , Nicholas D. Sidiropoulos

Multicarrier CDMA is a multiple access scheme in which modulated QAM symbols are spread over OFDMA tones by using a generally complex spreading sequence. Effectively, a QAM symbol is repeated over multiple tones. Low density signature (LDS)…

信息论 · 计算机科学 2016-11-18 Mahmoud Taherzadeh , Hosein Nikopour , Alireza Bayesteh , Hadi Baligh

The linearly constrained convex composite programming problems whose objective function contains two blocks with each block being the form of nonsmooth+smooth arises frequently in multiple fields of applications. If both of the smooth terms…

最优化与控制 · 数学 2021-11-25 Congying Qin , Yunhai Xiao , Peili Li

Text-Based Person Search (TBPS) aims to retrieve target person images from a large-scale gallery using natural language descriptions, posing fundamental challenges in cross-modal representation learning. Existing methods often struggle to…

计算机视觉与模式识别 · 计算机科学 2025-12-09 Jing Liu , Donglai Wei , Yang Liu , Sipeng Zhang , Tong Yang , Wei Zhou , Weiping Ding , Victor C. M. Leung

Non-Orthogonal Multiple Access (NOMA) technology has emerged as a promising technology to enable massive connectivity and enhanced spectral efficiency in next-generation wireless networks. In this study, we propose a novel two-user downlink…

信息论 · 计算机科学 2025-12-19 Emirhan Zor , Bora Bozkurt , Ferkan Yilmaz

Gradient descent (GD) methods are commonly employed in machine learning problems to optimize the parameters of the model in an iterative fashion. For problems with massive datasets, computations are distributed to many parallel computing…

信息论 · 计算机科学 2019-03-06 Emre Ozfatura , Deniz Gunduz , Sennur Ulukus

A novel Gaussian mixture model (GMM) aided sparse Bayesian learning (SBL) framework is proposed for channel state information (CSI) estimation in orthogonal time-frequency space (OTFS) modulated systems. The key attribute of the proposed…

信号处理 · 电气工程与系统科学 2026-03-31 Surbhi Gehlot , Suraj Srivastava , Sandeep Kumar Yadav , Lajos Hanzo

Multi-user spatial modulation (SM) assisted by sparse code multiple access (SCMA) has been recently proposed to provide uplink high spectral efficiency transmission. The message passing algorithm (MPA) is employed to detect the transmitted…

信号处理 · 电气工程与系统科学 2020-08-19 Ibrahim Al-Nahhal , Octavia A. Dobre , Salama Ikki

Sparse coding (SC) is attracting more and more attention due to its comprehensive theoretical studies and its excellent performance in many signal processing applications. However, most existing sparse coding algorithms are nonconvex and…

机器学习 · 计算机科学 2017-09-12 Xiaodong Feng , Zhiwei Tang , Sen Wu

We provide a new robust convergence analysis of the well-known power method for computing the dominant singular vectors of a matrix that we call the noisy power method. Our result characterizes the convergence behavior of the algorithm when…

数据结构与算法 · 计算机科学 2015-02-05 Moritz Hardt , Eric Price

Subspace sparse coding (SSC) algorithms have proven to be beneficial to clustering problems. They provide an alternative data representation in which the underlying structure of the clusters can be better captured. However, most of the…

机器学习 · 计算机科学 2019-03-14 Babak Hosseini , Barbara Hammer

Sparse code multiple access (SCMA) is a promising technique for the enabling of massive connectivity in future machine-type communication networks, but it suffers from a limited diversity order which is a bottleneck for significant…

信息论 · 计算机科学 2023-08-28 Qu Luo , Zilong Liu , Gaojie Chen , Pei Xiao

Fueled by the ability to mine real-world graph data, GNN applications have experienced phenomenal growth. Sparse Matrix-Matrix Multiplication (SpMM) is a critical operator in GNNs. However, existing SpMM designs for GNNs struggle to adapt…

分布式、并行与集群计算 · 计算机科学 2026-05-18 Lixing Zhang , Guanhua Ye , Hongzheng Li , Shigang Li , Yingxia Shao

This paper considers linear minimum meansquare- error (MMSE) transceiver design problems for downlink multiuser multiple-input multiple-output (MIMO) systems where imperfect channel state information is available at the base station (BS)…

最优化与控制 · 数学 2013-11-26 Tadilo Endeshaw Bogale , Luc Vandendorpe

Sparse Code Multiple Access (SCMA) and Blind Interference Alignment (BIA) are key enablers for multi-user communication, yet each suffers from distinct limitations: SCMA faces high complexity and limited multiplexing gain, while BIA…

信息论 · 计算机科学 2026-03-05 Jianjian Wu , Chi-Tsun Cheng , Qingfeng Zhou , Jianlin Liang , Jinke Wu

We examine codes, over the additive Gaussian noise channel, designed for reliable communication at some specific signal-to-noise ratio (SNR) and constrained by the permitted minimum mean-square error (MMSE) at lower SNRs. The maximum…

信息论 · 计算机科学 2012-08-10 Ronit Bustin , Shlomo Shamai

Rate-splitting multiple access (RSMA) has been recognized as a promising physical layer strategy for 6G. Motivated by ever increasing popularity of cache-enabled content delivery in wireless communications, this paper proposes an innovative…

信息论 · 计算机科学 2022-04-26 Robert-Jeron Reifert , Alaa Alameer Ahmad , Yijie Mao , Aydin Sezgin , Bruno Clerckx

In many global Optimization Problems, it is required to evaluate a global point (min or max) in large space that calculation effort is very high. In this paper is presented new approach for optimization problem with subdivision labeling…

神经与进化计算 · 计算机科学 2013-07-23 Masoumeh Vali

In this paper, we propose a novel transmissive reconfigurable intelligent surface transceiver-enhanced robust and secure integrated sensing and communication network. A time-division sensing communication mechanism is designed for the…

信息论 · 计算机科学 2025-01-15 Ziwei Liu , Wen Chen , Qingqing Wu , Zhendong Li , Xusheng Zhu , Qiong Wu , Nan Cheng