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Conventional unsupervised hashing methods usually take advantage of similarity graphs, which are either pre-computed in the high-dimensional space or obtained from random anchor points. On the one hand, existing methods uncouple the…

计算机视觉与模式识别 · 计算机科学 2020-03-17 Yuming Shen , Jie Qin , Jiaxin Chen , Mengyang Yu , Li Liu , Fan Zhu , Fumin Shen , Ling Shao

In this paper, we propose a new erasure decoding algorithm for convolutional codes using the generator matrix. This implies that our decoding method also applies to catastrophic convolutional codes in opposite to the classic approach using…

信息论 · 计算机科学 2025-04-23 Julia Lieb , Raquel Pinto , Carlos Vela

The decoding of Low-Density Parity-Check codes by the Belief Propagation (BP) algorithm is revisited. We check the iterative algorithm for its convergence to a codeword (termination), we run Monte Carlo simulations to find the probability…

信息论 · 计算机科学 2007-07-13 M. G. Stepanov , M. Chertkov

The problem of joint source-channel coding is considered for a stationary remote (noisy) Gaussian source and a Gaussian channel. The encoder and decoder are assumed to be causal and their combined operations are subject to a delay…

信息论 · 计算机科学 2012-03-29 Erik Johannesson , Anders Rantzer , Bo Bernhardsson , Andrey Ghulchak

In this letter, we present a hybrid iterative decoder for non-binary low density parity check (LDPC) codes over binary erasure channel (BEC), based on which the recursion of the erasure probability is derived to design non-binary LDPC codes…

信号处理 · 电气工程与系统科学 2020-03-04 Yang Yu , Wen Chen , Lili Wei

We consider decoding of binary Tanner codes using message-passing iterative decoding and linear programming (LP) decoding in MBIOS channels. We present new certificates that are based on a combinatorial characterization for local-optimality…

信息论 · 计算机科学 2013-06-20 Nissim Halabi , Guy Even

We consider the problem of transmitting correlated data after independent encoding to a central receiver through orthogonal channels. We assume that the channel state information is not known at the transmitter. The receiver has access to…

信息论 · 计算机科学 2010-07-07 Arvind Yedla , Henry D. Pfister , Krishna R. Narayanan

In this paper, we study a remote source coding scenario in which binary phase shift keying (BPSK) modulation sources are corrupted by additive white Gaussian noise (AWGN). An intermediate node, such as a relay, receives these observations…

信息论 · 计算机科学 2024-05-14 Yi Song , Kai Wan , Zhenyu Liao , Giuseppe Caire

Representing images by compact hash codes is an attractive approach for large-scale content-based image retrieval. In most state-of-the-art hashing-based image retrieval systems, for each image, local descriptors are first aggregated as a…

计算机视觉与模式识别 · 计算机科学 2019-09-04 Thanh-Toan Do , Khoa Le , Tuan Hoang , Huu Le , Tam V. Nguyen , Ngai-Man Cheung

A novel inter-frame coding approach to the problem of varying channel-state conditions in broadcast wireless communication is developed in this paper; this problem causes the appropriate code-rate to vary across different transmitted frames…

信息论 · 计算机科学 2015-11-11 Hady Zeineddine , Mohammad M. Mansour

For improving short-length codes, we demonstrate that classic decoders can also be used with real-valued, neural encoders, i.e., deep-learning based codeword sequence generators. Here, the classical decoder can be a valuable tool to gain…

信息论 · 计算机科学 2023-05-05 Jannis Clausius , Marvin Geiselhart , Stephan ten Brink

The performance and the decoding complexity of a novel coding scheme based on the concatenation of maximum distance separable (MDS) codes and linear random fountain codes are investigated. Differently from Raptor codes (which are based on a…

信息论 · 计算机科学 2019-09-19 Francisco Lázaro , Giuliano Garrammone , Gianluigi Liva

This paper introduces an enhanced normalized min-sum decoder designed to address the performance and complexity challenges associated with developing parallelizable decoders for short BCH codes in high-throughput applications. The decoder…

信息论 · 计算机科学 2025-06-23 Guangwen Li , Xiao Yu

We propose a simple yet effective wireless network coding and decoding technique for a multiple unicast network. It utilizes spatial diversity through cooperation between nodes which carry out distributed encoding operations dictated by…

信息论 · 计算机科学 2012-09-06 Tugcan Aktas , A. Ozgur Yilmaz , Emre Aktas

Although BICM can significantly improves the BER performance by iteration processing between the demapping and the decoding in a traditional receiver, its design and performance in PNC system has fewer studied. This paper investigates a bit…

信息论 · 计算机科学 2013-10-03 Xu Li , Shengli Zhang , Gongbin Qian

This paper presents Bit-Interleaved Coded Modulation metrics for joint estimation detection using training or reference signal transmission strategies for short to long block length channels. We show that it is possible to enhance the…

信息论 · 计算机科学 2025-02-11 Mody Sy , Raymond Knopp

We address noisy message-passing decoding of lowdensity parity-check (LDPC) codes over additive white Gaussian noise channels. Message-passing decoders in which certain processing units iteratively exchange messages are common for decoding…

信息论 · 计算机科学 2015-06-02 Alla Tarighati , Hamed Farhadi , Farshad Lahouti

We investigate cat codes that can correct multiple excitation losses and identify two types of logical errors: bit-flip errors due to excessive excitation loss and dephasing errors due to quantum back-action from the environment. We show…

Coding over subsets (known as generations) rather than over all content blocks in P2P distribution networks and other applications is necessary for a number of practical reasons such as computational complexity. A penalty for coding only…

信息论 · 计算机科学 2010-05-04 Yao Li , Emina Soljanin , Predrag Spasojevic

Low-density parity-check (LDPC) codes have been used for communication over a two-user Gaussian broadcast channel. It has been shown in the literature that the optimal decoding of such system requires joint decoding of both user messages at…

信息论 · 计算机科学 2016-11-18 Mahdi Ramezani , Masoud Ardakani