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Quantized constant envelope (QCE) precoding, a new transmission scheme that only discrete QCE transmit signals are allowed at each antenna, has gained growing research interests due to its ability of reducing the hardware cost and the…

信息论 · 计算机科学 2023-02-21 Zheyu Wu , Ya-Feng Liu , Bo Jiang , Yu-Hong Dai

Millimeter wave (mmWave) massive MIMO can achieve orders of magnitude increase in spectral and energy efficiency, and it usually exploits the hybrid analog and digital precoding to overcome the serious signal attenuation induced by mmWave…

信息论 · 计算机科学 2016-04-01 Linglong Dai , Xinyu Gao , Jinguo Quan , Shuangfeng Han , Chih-Lin I

Analog-to-digital converters (ADCs) are a major contributor to the power consumption of multiple-input multiple-output (MIMO) communication systems with large number of antennas. Use of low resolution ADCs has been proposed as a means to…

信息论 · 计算机科学 2019-01-29 Abbas Khalili , Farhad Shirani , Elza Erkip , Yonina C. Eldar

Dual-functional radar-communication (DFRC) signal design has received much attention lately. We consider the scenario of one-bit massive multi-input multi-output (MIMO) wherein one-bit DACs are employed for the sake of saving hardware…

信号处理 · 电气工程与系统科学 2025-01-28 Wai-Yiu Keung , Hei Victor Cheng , Wing-Kin Ma

Massive multiple-input multiple-output (MIMO) systems have attracted much attention lately due to the many advantages they provide over single-antenna systems. Owing to the many antennas, low-cost implementation and low power consumption…

Low-resolution digital-to-analog converter (DAC) has shown great potential in facilitating cost- and power-efficient implementation of massive multiple-input multiple-output (MIMO) systems. We investigate the performance of a massive MIMO…

信息论 · 计算机科学 2019-01-30 Jindan Xu , Wei Xu , Fengkui Gong , Hua Zhang , Xiaohu You

Multiple-Input-Multiple-Output~(MIMO) signal detection is central to every state-of-the-art communication system, and enhancements in error performance and computation complexity of MIMO detection would significantly enhance data rate and…

网络与互联网体系结构 · 计算机科学 2024-09-06 Abhishek Kumar Singh , Ari Kapelyan , Davide Venturelli , Kyle Jamieson

Non-uniform message quantization techniques such as reconstruction-computation-quantization (RCQ) improve error-correction performance and decrease hardware complexity of low-density parity-check (LDPC) decoders that use a flooding…

信号处理 · 电气工程与系统科学 2021-04-20 Caleb Terrill , Linfang Wang , Sean Chen , Chester Hulse , Calvin Kuo , Richard Wesel , Dariush Divsalar

Post-training quantization (PTQ) is essential for deploying large diffusion transformers on resource-constrained hardware, but aggressive 4-bit quantization significantly degrades generative performance. Low-rank approximation methods have…

机器学习 · 计算机科学 2026-04-21 Yann Bouquet , Alireza Khodamoradi , Sophie Yáng Shen , Kristof Denolf , Mathieu Salzmann

Post-training quantization (PTQ) of large language models (LLMs) holds the promise in reducing the prohibitive computational cost at inference time. Quantization of all weight, activation and key-value (KV) cache tensors to 4-bit without…

机器学习 · 计算机科学 2025-02-05 Utkarsh Saxena , Sayeh Sharify , Kaushik Roy , Xin Wang

Low-resolution analog-to-digital converters (ADCs) have emerged as an efficient solution for massive multiple-input multiple-output (MIMO) systems to reap high data rates with reasonable power consumption and hardware complexity. In this…

信号处理 · 电气工程与系统科学 2024-11-12 Mengyuan Ma , Nhan Thanh Nguyen , Italo Atzeni , Markku Juntti

As communication systems advance towards the future 6G era, the incorporation of large-scale antenna arrays in base stations (BSs) presents challenges such as increased hardware costs and energy consumption. To address these issues, the use…

信号处理 · 电气工程与系统科学 2024-07-18 Mingjie Shao , Wei-Kun Chen , Cheng-Yang Yu , Ya-Feng Liu , Wing-Kin Ma

In order to deploy deep models in a computationally efficient manner, model quantization approaches have been frequently used. In addition, as new hardware that supports mixed bitwidth arithmetic operations, recent research on mixed…

机器学习 · 计算机科学 2022-07-12 Xijie Huang , Zhiqiang Shen , Shichao Li , Zechun Liu , Xianghong Hu , Jeffry Wicaksana , Eric Xing , Kwang-Ting Cheng

The use of low-resolution digital-to-analog converters (DACs) for transmit precoding provides crucial energy efficiency advantage for massive multiple-input multiple-output (MIMO) implementation. This paper formulates a quadrature amplitude…

信息论 · 计算机科学 2018-07-04 Foad Sohrabi , Ya-Feng Liu , Wei Yu

This paper considers an uplink multiuser multiple-input-multiple-output (MU-MIMO) system with one-bit analog-to-digital converters (ADCs), in which $K$ users with a single transmit antenna communicate with one base station (BS) with $N_{\rm…

信息论 · 计算机科学 2017-07-14 S. Kim , N. Lee , S. -N. Hong

Quantum Annealing (QA)-accelerated MIMO detection is an emerging research approach in the context of NextG wireless networks. The opportunity is to enable large MIMO systems and thus improve wireless performance. The approach aims to…

网络与互联网体系结构 · 计算机科学 2024-03-12 Minsung Kim , Abhishek Kumar Singh , Davide Venturelli , John Kaewell , Kyle Jamieson

In this paper, we consider an automatic-repeat-request (ARQ) retransmission protocol signaling over a block-fading multiple-input, multiple-output (MIMO) channel. Unlike previous work, we allow for multiple fading blocks within each…

信息论 · 计算机科学 2016-11-15 Allen Chuang , Albert Guillen i Fabregas , Lars K. Rasmussen , Iain B. Collings

The uplink achievable rate of massive multiple- input-multiple-output (MIMO) systems, where the low-resolution analog-to-digital converters (ADCs) are assumed to equip at the base station (BS), is investigated in this paper. We assume that…

信息论 · 计算机科学 2018-01-31 Kai Liu , Cheng Tao , Liu Liu , Yinsheng Liu

Real-time object detection plays a vital role in various computer vision applications. However, deploying real-time object detectors on resource-constrained platforms poses challenges due to high computational and memory requirements. This…

计算机视觉与模式识别 · 计算机科学 2023-07-12 Mingze Wang , Huixin Sun , Jun Shi , Xuhui Liu , Baochang Zhang , Xianbin Cao

We investigate a reconfigurable intelligent surface (RIS)-aided multi-user massive multiple-input multi-output (MIMO) system where low-resolution digital-analog converters (DACs) are configured at the base station (BS) in order to reduce…

信息论 · 计算机科学 2021-08-24 Jianxin Dai , Yuanyuan Wang , Cunhua Pan , Kangda Zhi , Hong Ren , Kezhi Wang