Results 121 to 130 of about 46,791 (149)

Duobinary pulse shaping for frequency chirp enabled complex modulation

Optics Letters, 2016
Di Che, Feng Yuan, Hamid Khodakarami
exaly   +2 more sources

Intrapulse Effect Compensation Method for SAR Systems With Up- and Down-Chirp Modulation

IEEE Geoscience and Remote Sensing Letters
The motion of the synthetic aperture radar (SAR) sensor during the transmit and receive events introduces a space-invariant polychromatic phase, known as intrapulse (IP) effect, which may degrade the impulse response function (IRF) if left uncorrected. A
Nida Sakar, P. Prats-Iraola, M. Rodríguez-Cassola   +2 more
semanticscholar   +1 more source

Unified Block Signal Processing Framework for LPWANs: Sequence Index Modulation Spreading

arXiv.org
Low-power wide-area networks (LPWANs) demand high receiver sensitivity and efficient physical-layer signal processing. This paper introduces a unified framework for generalized block signal transmission in LPWANs, addressing the limitations of ...
Wenkun Wen, Tierui Min, Long Yuan, M. Xia   +3 more
semanticscholar   +1 more source

Comparison of radar waveforms combining pseudo‐random binary phase coding and chirp modulation for an high‐frequency monostatic radar

IET Radar, Sonar and Navigation, 2016
Shuzhu Shi, Zhengyu Zhao, Jing-nan Liu
exaly   +2 more sources

PAPR and BER analysis of Chirp Transform based OTFS

2025 International Conference on Wireless Communications Signal Processing and Networking (WiSPNET)
Orthogonal Time Frequency Space (OTFS) modulation is a cutting-edge technique designed to provide superior performance in high-mobility environments and frequency-selective channels.
Hanumantharao Bitra, K. Bagadi, B. Gudibandi, K. Satyanarayana   +3 more
semanticscholar   +1 more source

Chirp Index Modulated Pilots-Aided Joint Activity Detection and Channel Estimation for Asynchronous Massive Access

IEEE Transactions on Vehicular Technology
In the massive machine-type communications (mMTC) supported by grant-free access with massive MIMO, the BS faces the urgent task of the joint activity detection and channel estimation (JADCE).
Yurong Guo, Zujun Liu
semanticscholar   +1 more source

ZChirp: Speeding Up LPWANs by Combining the Chirp with Binary Sequences

Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks
Low Power Wide Area Networks (LPWAN), such as LoRa, support long range wireless connections for a vast number of low power IoT devices. One of the main challenges in LPWANs is to provide high network capacity. In this paper, a novel modulation technique,
Zhenghao Zhang
semanticscholar   +1 more source

High-Security Orthogonal Circulant Multiplexing Encryption Scheme With Three-Dimensional Index Modulation

Journal of Lightwave Technology
This paper proposes a high-security orthogonal circulant multiplexing (OCM) chaotic encryption scheme based on three-dimensional index modulation (3D-IM).
Nan Jia, Jie Ma, Jia Lu, Jianfei Liu, Xiangye Zeng, Yang Wang   +5 more
semanticscholar   +1 more source

Influence of the Spectral Chirp on the BER in High Bit Rate Optical Fiber Communication System

2026 ElCon Conference of Young Researchers in Communication and Networking, Signal Processing & Analysis, Biomedical and Environmental Engineering (ElCon-CN)
Method of the direct modulation on the pump current of a semiconductor laser is an effective way to generate a code sequence of optical pulses at gigabit data rates.
Nikita Saltykov, Vladimir Kassihin, Dmitry P. Andreev, E. Andreeva   +3 more
semanticscholar   +1 more source

An Off-The-Shelf Modulation-Based Enhancement for Automotive Radar Target Emulators

German Microwave Conference
Radar sensors in Advanced Driving Assistance Systems (ADAS) allow sensing of the driving environment and identification of vulnerable traffic participants.
A. Sims, B. Holzinger, T. Vandeplas, T. Dallmann, D. Heberling   +4 more
semanticscholar   +1 more source