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Deep convolutional neural networks (CNNs) have demonstrated dominant performance in person re-identification (Re-ID). Existing CNN based methods utilize global average pooling (GAP) to aggregate intermediate convolutional features for…

计算机视觉与模式识别 · 计算机科学 2020-01-09 Zhigang Chang , Qin Zhou , Heng Fan , Hang Su , Hua Yang , Shibao Zheng , Haibin Ling

User-centric (UC) based cell-free (CF) structures can provide the benefits of coverage enhancement for millimeter wave (mmWave) multiple input multiple output (MIMO) systems, which is regarded as the key technology of the reliable and…

信息论 · 计算机科学 2022-05-10 Yingrong Zhong , Yashuai Cao , Tiejun Lv

Due to the speed limitation of the conventional bit-chosen strategy in the existing weighted bit flipping algorithms, a high-speed LDPC decoder cannot be realized. To solve this problem, we propose a fast weighted bit flipping (FWBF)…

信息论 · 计算机科学 2012-06-18 Kexiang Ma , Yongzhao Li , Caizhi Zhu , Hailin Zhang , Feng Qi

Compute-and-forward (CF) harnesses interference in a wireless networkby allowing relays to compute combinations of source messages. The computed message combinations at relays are correlated, and so directly forwarding these combinations to…

信息论 · 计算机科学 2016-01-20 Yihua Tan , Xiaojun Yuan

In this work, we study the performance of a single relay Multiple Input Multiple Output (MIMO) cooperative communication system based on Decode and Forward (DF) relaying protocol for two strategies using transmit antenna selection at the…

信号处理 · 电气工程与系统科学 2017-11-13 Mokhtar Bouteggui , Fatiha Merazka

Wireless energy harvesting constitutes an effective way to prolong the lifetime of wireless networks. In this paper, an opportunistic decode-and-forward cooperative communication system is investigated, where the energy-constrained relays…

信息论 · 计算机科学 2018-01-23 Yanju Gu

We investigate techniques for designing modulation/coding schemes for the wireless two-way relaying channel. The relay is assumed to have perfect channel state information, but the transmitters are assumed to have no channel state…

信息论 · 计算机科学 2011-07-29 Brett Hern , Krishna Narayanan

In this paper, we dynamically select the transmission rate and design wireless network coding to improve the quality of services such as delay for time critical applications. With low transmission rate, and hence longer transmission range,…

网络与互联网体系结构 · 计算机科学 2016-11-18 Xiumin Wang , Chau Yuen , Yinlong Xu

The problem of optimal power allocation among the relays in a two-hop decode-and-forward cooperative relay network with independent Rayleigh fading channels is considered. It is assumed that only the relays that decode the source message…

信息论 · 计算机科学 2015-05-27 Arash Khabbazibasmenj , Sergiy A. Vorobyov

This paper studies dual-hop amplify-and-forward relaying over time-varying Rayleigh fading channels with differential M-PSK modulation and non-coherent detection. For the case of "two-symbol" detection, a first order time-series model is…

信息论 · 计算机科学 2014-03-24 M. R. Avendi , Ha H. Nguyen

In this paper, we investigate a cell-free massive MIMO system with both access points and user equipments equipped with multiple antennas over the Weichselberger Rayleigh fading channel. We study the uplink spectral efficiency (SE) based on…

信息论 · 计算机科学 2022-01-28 Zhe Wang , Jiayi Zhang , Hien Quoc Ngo , Bo Ai , Mérouane Debbah

We propose a novel cooperative transmission scheme called "Convolutional Network-Coded Cooperation" (CNCC) for a network including N sources, one M-antenna relay, and one common destination. The source-relay (S-R) channels are assumed to be…

网络与互联网体系结构 · 计算机科学 2013-09-03 Alireza Karbalay-Ghareh , Masoumeh Nasiri-Kenari , Mohsen Hejazi

In selective cooperative relaying only a single relay out of the set of available relays is activated, hence the available power and bandwidth resources are efficiently utilized. However, implementing selective cooperative relaying in…

Physical-layer Network Coding (PNC) can significantly improve the throughput of wireless two way relay channel (TWRC) by allowing the two end nodes to transmit messages to the relay simultaneously. To achieve reliable communication, channel…

网络与互联网体系结构 · 计算机科学 2016-11-15 Shengli Zhang , Soung-Chang Liew

Wireless signal recognition (WSR) is crucial in modern and future wireless communication networks since it aims to identify the properties of the received signal in a no-collaborative manner. However, it is challenging to accurately…

信号处理 · 电气工程与系统科学 2025-09-22 Hao Zhang , Fuhui Zhou , Qihui Wu , Chau Yuen

The effect of different spreading codes in DWT based MC-CDMA wireless communication system is investigated. In this paper, we present the Bit Error Rate (BER) performance of different spreading codes (Walsh-Hadamard code, Orthogonal gold…

信息论 · 计算机科学 2012-07-18 Saleh Masum , M. Hasnat Kabir , Md. Matiqul Islam , Rifat Ara Shams , Shaikh Enayet Ullah

Discriminatory channel estimation (DCE) is a recently developed strategy to enlarge the performance difference between a legitimate receiver (LR) and an unauthorized receiver (UR) in a multiple-input multiple-output (MIMO) wireless system.…

信息论 · 计算机科学 2016-11-17 Junjie Yang , Shengli Xie , Xiangyun Zhou , Rong Yu , Yan Zhang

Channel uncertainty and co-channel interference are two major challenges in the design of wireless systems such as future generation cellular networks. This paper studies receiver design for a wireless channel model with both time-varying…

信息论 · 计算机科学 2009-10-15 Yan Zhu , Dongning Guo , Michael L. Honig

We study a variant of unequal error protection in channel coding, where the message bit string is divided into a finite number of blocks and the maximization objective is a weighted sum of per-block decoding success probabilities. The…

信息论 · 计算机科学 2026-04-09 Adeel Mahmood

This paper studies a hierarchical over-the-air computation (AirComp) network over a large area, in which multiple relays are exploited to facilitate data aggregation from massive WDs. We present a two-phase amplify-and-forward (AF) relaying…

信息论 · 计算机科学 2022-01-25 Feng Wang , Jie Xu , Vincent K. N. Lau , Shuguang Cui