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Main Authors:	Reddy, Badri Ramanjaneya, Dash, Soumya P., Alexandropoulos, George C.
Format:	Preprint
Published:	2025
Subjects:	Signal Processing
Online Access:	https://arxiv.org/abs/2503.20293
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Optimal Multi-Level ASK Modulations for RIS-Assisted Communications with Energy-Based Noncoherent Reception
by: Mishra, Sambit, et al.
Published: (2024)

RIS-Assisted Noncoherent Wireless System: Error Analysis with Optimal Receiver and Multi-level ASK
by: Mishra, Sambit, et al.
Published: (2025)

Symbol Error Analysis for Fluid Antenna Systems with One- and Two-Dimensional Modulation Schemes
by: Dash, Soumya P., et al.
Published: (2026)

Outage Probability Analysis of MRC-Based Fluid Antenna Systems under Rician Fading
by: Ganesh, Tummi, et al.
Published: (2025)

Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems
by: Kumar, Sushil, et al.
Published: (2025)

Quadratic Detection in Noncoherent Massive SIMO Systems over Correlated Channels
by: Vilà-Insa, Marc, et al.
Published: (2023)

Secret Key Rate Analysis of RIS-Assisted THz MIMO CV-QKD Systems under Localized and Global Eavesdropping
by: Kumar, Sushil, et al.
Published: (2026)

Multi-User Symbol Detection with XL Reception: Dynamic Metasurface Antennas with Low Resolution ADCs
by: Pal, Rahul K., et al.
Published: (2026)

Optimal Bit Detection in Thermal Noise Communication Systems Under Rician Fading
by: Jbari, Mohamed El, et al.
Published: (2025)

SEP Analysis of Quantized SIMO Systems with M-PSK over Correlated Fading Channels
by: Ravinath, Amila, et al.
Published: (2026)

RIS-Assisted MIMO CV-QKD at THz Frequencies: Channel Estimation and SKR Analysis
by: Kumar, Sushil, et al.
Published: (2024)

Performance Analysis of Fluid Antenna System under Spatially-Correlated Rician Fading Channels
by: Huangfu, Jiangsheng, et al.
Published: (2025)

SEP Analysis of 1-Bit Quantized SIMO Systems with QPSK over Fading Channels
by: Ravinath, Amila, et al.
Published: (2025)

SEP Analysis of a Low-Resolution SIMO System with M-PSK over Fading Channels
by: Ravinath, Amila, et al.
Published: (2026)

Noncoherent Maximum Likelihood Detection for LoRa Signals in Multipath Fading
by: Nguyen, The Khai, et al.
Published: (2026)

Rare-Event Simulation of Outage Probability in GSC/MRC Systems under Rician Fading
by: Ghazal, Mahmoud, et al.
Published: (2025)

On the Spectral Efficiency of Movable and Rotary Antenna Arrays under Rician Fading
by: Tominaga, Eduardo Noboro, et al.
Published: (2024)

On the Spectral Efficiency of D-MIMO Networks under Rician Fading
by: Tominaga, Eduardo Noboro, et al.
Published: (2024)

Distributed MIMO Networks with Rotary ULAs for Indoor Scenarios under Rician Fading
by: Tominaga, Eduardo Noboro, et al.
Published: (2024)

End-to-End Secure Connection Probability in MultiLayer Networks with Heterogeneous Rician Fading
by: Lyu, Hyeonsu, et al.
Published: (2026)

Time-Domain Channel Estimation for Extremely Large MIMO THz Communication Systems Under Dual-Wideband Fading Conditions
by: Vlachos, Evangelos, et al.
Published: (2023)

Hardware-Impaired Rician-Faded Cell-Free Massive MIMO Systems With Channel Aging
by: Tentu, Venkatesh, et al.
Published: (2023)

Towards Optimal Pilot Spacing and Power Control in Multi-Antenna Systems Operating Over Non-Stationary Rician Aging Channels
by: Daei, Sajad, et al.
Published: (2024)

On the Performance of IRS-Assisted SSK and RPM over Rician Fading Channels
by: Raj, Harsh, et al.
Published: (2024)

Asymptotic Performance of the GSVD-Based MIMO-NOMA Communications with Rician Fading
by: Rao, Chenguang, et al.
Published: (2023)

Secret Key Generation on Aerial Rician Fading Channels Against a Curious Receiver
by: Piana, Mattia, et al.
Published: (2025)

The SIMO Block Rayleigh Fading Channel Capacity Scaling with Number of Antennas, Bandwidth and Coherence Length
by: Gomez-Cuba, Felipe
Published: (2022)

Optimal Bilinear Equalizer for Cell-Free Massive MIMO Systems over Correlated Rician Channels
by: Wang, Zhe, et al.
Published: (2024)

DMA Reception for Simultaneous Area-Wide Sensing and Multi-User Uplink Communications
by: Gavras, Ioannis, et al.
Published: (2025)

Tracking-Aided Multi-User MIMO Communications with Hybrid Reconfigurable Intelligent Surfaces
by: Gavras, Ioannis, et al.
Published: (2025)

Harnessing Wavefront Curvature and Spatial Correlation in Noncoherent MIMO Communications
by: Martí, Aniol, et al.
Published: (2025)

Asymptotically Optimal Closed-Form Phase Configuration of $1$-bit RISs via Sign Alignment
by: Stylianopoulos, Kyriakos, et al.
Published: (2024)

Robust Consensus-Based Distributed Beamforming for Wideband Cell-free Multi-RIS MISO Systems
by: Katsanos, Konstantinos D., et al.
Published: (2026)

MIMO Communications with 1-bit RIS: Asymptotic Analysis and Over-the-Air Channel Diagonalization
by: Gavriilidis, Panagiotis, et al.
Published: (2025)

Outage Analysis of TAS-NOMA Systems With Multi-Antenna Users Over α-μ Fading
by: García, Fernando D. Almeida, et al.
Published: (2025)

Integrating Stacked Intelligent Metasurfaces and Power Control for Dynamic Edge Inference via Over-The-Air Neural Networks
by: Stylianopoulos, Kyriakos, et al.
Published: (2025)

Multi-RIS-Empowered Communication Systems: Capacity Analysis and Optimization
by: Moustakas, Aris L., et al.
Published: (2025)

Universal Approximation with XL MIMO Systems: OTA Classification via Trainable Analog Combining
by: Stylianopoulos, Kyriakos, et al.
Published: (2025)

RIS-Augmented Millimeter-Wave MIMO Systems for Passive Drone Detection
by: He, Jiguang, et al.
Published: (2024)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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