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Hypergraph product codes are a class of constant-rate quantum low-density parity-check (LDPC) codes equipped with a linear-time decoder called small-set-flip (SSF). This decoder displays sub-optimal performance in practice and requires very…

Quantum Physics · Physics 2021-04-21 Antoine Grospellier , Lucien Grouès , Anirudh Krishna , Anthony Leverrier

Verification is a key bottleneck in improving inference speed while maintaining distribution fidelity in Speculative Decoding. Recent work has shown that sequence-level verification leads to a higher number of accepted tokens compared to…

Artificial Intelligence · Computer Science 2026-03-03 Yuxuan Zhou , Fei Huang , Heng Li , Fengyi Wu , Tianyu Wang , Jianwei Zhang , Junyang Lin , Zhi-Qi Cheng

UAVs are capable of improving the performance of next generation wireless systems. Specifically, UAVs can be exploited as aerial base-stations (UAV-BS) for supporting legitimate ground users in remote uncovered areas or in environments…

Information Theory · Computer Science 2022-09-27 Hamed Bastami , Hamid Behroozi , Majid Moradikia , Ahmed Abdelhadi , Derrick Wing Kwan Ngand , Lajos Hanzo

Multiple access techniques are vital for 5G and beyond. While Orthogonal Frequency Division Multiple Access (OFDMA) is standard, its high peak-to-average power ratio (PAPR) reduces energy efficiency in uplink transmissions. This paper…

Signal Processing · Electrical Eng. & Systems 2026-04-13 Gokce Hacioglu , Serkan Vela

In this paper, a novel secure and private over-the-air federated learning (SP-OTA-FL) framework is studied where noise is employed to protect data privacy and system security. Specifically, the privacy leakage of user data and the security…

Signal Processing · Electrical Eng. & Systems 2022-10-17 Na Yan , Kezhi Wang , Kangda Zhi , Cunhua Pan , Kok Keong Chai , H. Vincent Poor

The problem of excessive pilot overhead required for uplink massive MIMO channel estimation is well known, let alone when it is considered along with wideband (OFDM) transmissions. Towards channel estimators that are both efficient and…

Information Theory · Computer Science 2018-12-11 Gerhard Wunder , Stelios Stefanatos , Axel Flinth , Ingo Roth , Giuseppe Caire

The reliability function of variable-rate Slepian-Wolf coding is linked to the reliability function of channel coding with constant composition codes, through which computable lower and upper bounds are derived. The bounds coincide at rates…

Information Theory · Computer Science 2016-08-08 Jun Chen , Da-ke He , Ashish Jagmohan , Luis A. Lastras-Montaño

Superimposed pilot (SIP) transmission improves spectral efficiency by eliminating the dedicated pilot overhead required in orthogonal pilot (OP)-based schemes. However, SIP suffers from severe pilot-data coupling, which leads to a critical…

Information Theory · Computer Science 2026-05-29 Xinjie Li , Xingyu Zhou , Jing Zhang , Chao-Kai Wen , Xiao Li , Shi Jin

High peak-to-average power ratio (PAPR) is a critical problem in orthogonal frequency-division multiplexing (OFDM). The fifth-generation New Radio (5G NR) facilitates the utilization of multiple heterogeneous bandwidth parts (BWPs), which…

Signal Processing · Electrical Eng. & Systems 2019-09-06 Selahattin Gökceli , Toni Levanen , Juha Yli-Kaakinen , Taneli Riihonen , Markku Renfors , Mikko Valkama

This work proposes model design in securing the IEEE 802.16 WiMAX Physical and MAC layer, using Orthogonal Frequency Division Multiplexing (OFDM) and STBC model. Typically, it addresses the physical and MAC layer security concerns, using a…

Cryptography and Security · Computer Science 2013-09-20 Samuel Erskine , Ziengpieng WU

Being an effective non-orthogonal multiple access (NOMA) technique, sparse code multiple access (SCMA) is promising for future wireless communication. Compared with orthogonal techniques, SCMA enjoys higher overloading tolerance and lower…

Information Theory · Computer Science 2018-04-03 Chuan Zhang , Chao Yang , Wei Xu , Shunqing Zhang , Zaichen Zhang , Xiaohu You

Beam alignment (BA) is a crucial process in millimeter-wave (mmWave) communications, enabling precise directional transmission and efficient link establishment. However, due to characteristics like omnidirectional exposure and the broadcast…

Cryptography and Security · Computer Science 2025-07-15 Yulin Teng , Keshuang Han , Pinchang Zhang , Xiaohong Jiang , Yulong Shen , Fu Xiao

Metric Differential Privacy (mDP) extends the local differential privacy (LDP) framework to metric spaces, enabling more nuanced privacy protection for data such as geo-locations. However, existing mDP optimization methods, particularly…

Cryptography and Security · Computer Science 2025-09-11 Ruiyao Liu , Chenxi Qiu

We consider multi-antenna base stations using orthogonal frequency division multiple access and space division multiple access techniques to serve single-antenna users. Some users, called real-time users, have minimum rate requirements and…

Information Theory · Computer Science 2013-11-27 Diego Perea-Vega , Jean-Francois Frigon , Andre Girard

Reconstructing high-fidelity MR images from undersampled k-space data requires recovering high-frequency details while maintaining anatomical coherence. We present HiFi-MambaV2, a hierarchical shared-routed Mixture-of-Experts (MoE) Mamba…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Pengcheng Fang , Hongli Chen , Guangzhen Yao , Jian Shi , Fangfang Tang , Xiaohao Cai , Shanshan Shan , Feng Liu

On top of the Resource Public Key Infrastructure (RPKI), the Route Origin Authorization (ROA) creates a cryptographically verifiable binding of an autonomous system to a set of IP prefixes it is authorized to originate. By their design,…

Cryptography and Security · Computer Science 2024-12-10 Yanbiao Li , Hui Zou , Yuxuan Chen , Yinbo Xu , Zhuoran Ma , Di Ma , Ying Hu , Gaogang Xie

A new protograph-based framework for message passing (MP) decoding of low density parity-check (LDPC) codes with Hamming weight amplifiers (HWAs), which are used e.g. in the NIST post-quantum crypto candidate LEDAcrypt, is proposed. The…

Cryptography and Security · Computer Science 2020-02-10 Hannes Bartz , Emna Ben Yacoub , Lorenza Bertarelli , Gianluigi Liva

We derive the spectral domain properties of two-dimensional (2-D) $(\lambda_1, \lambda_2)$-constacyclic codes over $\mathbb{F}_q$ using the 2-D finite field Fourier transform (FFFT). Based on the spectral nulls of 2-D $(\lambda_1,…

Information Theory · Computer Science 2025-05-12 Vidya Sagar , Shikha Patel , Shayan Srinivasa Garani

Iterative decoders used for decoding low-density parity-check (LDPC) and moderate-density parity-check (MDPC) codes are not characterized by a deterministic decoding radius and their error rate performance is usually assessed through…

Information Theory · Computer Science 2020-02-27 Paolo Santini , Massimo Battaglioni , Marco Baldi , Franco Chiaraluce

This work proposes a superimposed pilot (SP)-based channel estimation and data detection framework for orthogonal time-frequency space (OTFS) scheme, wherein low-powered pilots are superimposed on to data symbols in the delay-Doppler…

Signal Processing · Electrical Eng. & Systems 2020-10-29 Himanshu B. Mishra , Prem Singh , Abhishek K. Prasad , Rohit Budhiraja
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