Tootfinder

Como o letramento em ficção científica ajuda a inovar na comunicação e nos negócios e a criar uma sociedade melhor?
https://cassano.com.br/2025/08/31/a-arte-de-prever-engarrafamentos/

A arte de prever engarrafamentos – Brogue do Cassano
Como o letramento em ficção científica (SciFi) ajuda a inovar na comunicação e nos negócios e a criar uma sociedade melhor?

Dynamical Multimodal Fusion with Mixture-of-Experts for Localizations
Bohao Wang, Zitao Shuai, Fenghao Zhu, Chongwen Huang, Yongliang Shen, Zhaoyang Zhang, Qianqian Yang, Sami Muhaidat, Merouane Debbah
https://arxiv.org/abs/2507.01337

Dynamical Multimodal Fusion with Mixture-of-Experts for Localizations
Multimodal fingerprinting is a crucial technique to sub-meter 6G integrated sensing and communications (ISAC) localization, but two hurdles block deployment: (i) the contribution each modality makes to the target position varies with the operating conditions such as carrier frequency, and (ii) spatial and fingerprint ambiguities markedly undermine localization accuracy, especially in non-line-of-sight (NLOS) scenarios. To solve these problems, we introduce SCADF-MoE, a spatial-context aware dyn…

Zak-OFDM: Low Complexity Joint Equalization of OFDM Carriers in Doubly-Spread Channels
Saif Khan Mohammed, Sandesh Rao Mattu, Nishant Mehrotra, Venkatesh Khammammetti, Robert Calderbank
https://arxiv.org/abs/2506.23045

Zak-OFDM: Low Complexity Joint Equalization of OFDM Carriers in Doubly-Spread Channels
We communicate over wireless channels by first estimating and then equalizing the effective channel. In Zak-OTFS (orthogonal time frequency space) modulation the carrier waveform is a pulse in the delay-Doppler (DD) domain, formally a quasi-periodic localized function with specific periods along delay and Doppler. When the channel delay spread is less than the delay period, and the channel Doppler spread is less than the Doppler period, the response to a single Zak-OTFS carrier provides an imag…

Il y a, paraît-il, des gens qui écrivent le livre qu'ils voudraient lire (transposable Š d'autres arts, je suppose). C'est peut-être pour ça qu'il m'est Š moi si difficile d'écrire: par d'heureux (?) hasards, je tombe régulièrement sur le livre d'un autre qui est celui que j'aurais voulu écrire, voire suis en train d'écrire.
Dernier en date : Don DeLillo, "Body Art" ( je le commence tout juste, peut-être finira-t-il par me décevoir).

Comparison of FTN-NOFDM and PCS-OFDM for Long-Haul Coherent Optical Communications
Haide Wang, Ji Zhou, Yongcheng Li, Weiping Liu, Changyuan Yu, Xiangjun Xin, Liangchuan Li
https://arxiv.org/abs/2508.17350

Comparison of FTN-NOFDM and PCS-OFDM for Long-Haul Coherent Optical Communications
Single-wavelength 400G coherent optical communications have become a critical solution to meet the explosive traffic demands. However, the single-carrier modulation using low-order modulation formats requires a broader wavelength division multiplexing grid and expands the occupied optical bandwidth. In this paper, we propose the faster-than-Nyquist non-orthogonal frequency division multiplexing (FTN-NOFDM) to improve the spectral efficiency for long-haul coherent optical communications. The sub…

Constant Modulus Waveforms for IoT-Centric Integrated Sensing and Communications
Tian Han, Shalanika Dayarathna, Rajitha Senanayake, Peter Smith, Aryan Kaushik, Alain Mourad, Richard A. Stirling-Gallacher, Jamie Evans
https://arxiv.org/abs/2506.21078

Constant Modulus Waveforms for IoT-Centric Integrated Sensing and Communications
Integrated sensing and communications (ISAC) is considered a key enabler to support application scenarios such as the Internet-of-Things (IoT) in which both communications and sensing play significant roles. Multi-carrier waveforms, such as orthogonal frequency division multiplexing (OFDM), have been considered as good candidates for ISAC due to their high communications data rate and good time bandwidth property for sensing. Nevertheless, their high peak-to-average-power-ratio (PAPR) values le…

In-Lab Carrier Aggregation Testbed for Satellite Communication Systems
Jorge L. Gonzalez-Rios, Eva Lagunas, Hayder Al-Hraishawi, Luis M. Garces-Socarras, Symeon Chatzinotas
https://arxiv.org/abs/2508.19439

In-Lab Carrier Aggregation Testbed for Satellite Communication Systems
Carrier Aggregation (CA) is a technique used in 5G and previous cellular generations to temporarily increase the data rate of a specific user during peak demand periods or to reduce carrier congestion. CA is achieved by combining two or more carriers and providing a virtual, wider overall bandwidth to high-demand users of the system. CA was introduced in the 4G/LTE wireless era and has been proven effective in 5G as well, where it is said to play a significant role in efficient network capacity…

Meta-Reinforcement Learning Optimization for Movable Antenna-aided Full-Duplex CF-DFRC Systems with Carrier Frequency Offset
Yue Xiu, Wanting Lyu, You Li, Ran Yang, Phee Lep Yeoh, Wei Zhang, Guangyi Liu, Ning Wei
https://arxiv.org/abs/2507.16132

Meta-Reinforcement Learning Optimization for Movable Antenna-aided Full-Duplex CF-DFRC Systems with Carrier Frequency Offset
By enabling spectrum sharing between radar and communication operations, the cell-free dual-functional radar-communication (CF-DFRC) system is a promising candidate to significantly improve spectrum efficiency in future sixth-generation (6G) wireless networks. However, in wideband scenarios, synchronization errors caused by carrier frequency offset (CFO) can severely reduce both communication capacity and sensing accuracy. To address this challenge, this paper integrates movable antennas (MAs) …

DCFNet: Doppler Correction Filter Network for Integrated Sensing and Communication in Multi-User MIMO-OFDM Systems
Hyeonho Noh, Hyeonsu Lyu, Moe Z. Win, Hyun Jong Yang
https://arxiv.org/abs/2506.16191

DCFNet: Doppler Correction Filter Network for Integrated Sensing and Communication in Multi-User MIMO-OFDM Systems
Integrated sensing and communication (ISAC) is a headline feature for the forthcoming IMT-2030 and 6G releases, yet a concrete solution that fits within the established orthogonal frequency division multiplexing (OFDM) family remains open. Specifically, Doppler-induced inter-carrier interference (ICI) destroys sub-carrier orthogonality of OFDM sensing signals, blurring range-velocity maps and severely degrading sensing accuracy. Building on multi-user multi-input-multi-output (MIMO) OFDM system…

Instantaneous Polarimetry with Zak-OTFS
Nishant Mehrotra, Sandesh Rao Mattu, Robert Calderbank
https://arxiv.org/abs/2508.19185 https://arxiv.org/pdf/2508.…

Instantaneous Polarimetry with Zak-OTFS
Polarimetry, which is the ability to measure the scattering response of the environment across orthogonal polarizations, is fundamental to enhancing wireless communication and radar system performance. In this paper, we utilize the Zak-OTFS modulation to enable instantaneous polarimetry within a single transmission frame. We transmit a Zak-OTFS carrier waveform and a spread carrier waveform mutually unbiased to it simultaneously over orthogonal polarizations. The mutual unbiasedness of the two …