Results 11 to 20 of about 2,131,184 (147)
Chirp Spread Spectrum Transceiver Design and Implementation for Real Time Locating System
International Journal of Distributed Sensor Networks, 2015 A chirp spread spectrum (CSS) transceiver architecture for IEEE 802.15.4a is proposed and implemented. In the transmitter, the size of the read-only memory that stores CSS signal samples for the chirp modulator is reduced by removing duplicate samples ...
Sangdeok Kim, Jong-Wha Chong
doaj +2 more sources
Sensors, 2020 The objective of this paper is to provide a multiuser transmission technique for underwater acoustic communication in the framework of an Autonomous Underwater Vehicle (AUV) fleet.
Christophe Bernard +3 more
doaj +2 more sources
A novel mobile communication system using Pulse Position based Chirp Spread Spectrum modulation [PDF]
Journal of Communications Software and Systems, 2018 The paper presents a new mobile communication system based on Chirp Spread Spectrum (CSS) transmission. The downlink modulation scheme is extended with Pulse Position Modulation (PPM) to carry data for multiple mobile terminals simultaneously.
Adam Knapp, Laszlo Pap
doaj +2 more sources
Long-Range Acoustic Communication Using Differential Chirp Spread Spectrum
Applied Sciences, 2020 Here, we propose a new modulation method using chirp spread spectrum (CSS) modulation to indicate the result of long-range acoustic communication (LRAC).
Joohyoung Lee +3 more
doaj +2 more sources
Dual-Mode Time Domain Multiplexed Chirp Spread Spectrum [PDF]
, 2022 We propose a dual-mode (DM) time domain multiplexed (TDM) chirp spread spectrum (CSS) modulation for spectral and energy-efficient low-power wide-area networks (LPWANs).
Shubair, Raed +4 more
core +1 more source
LoRa and Rotating Polarization Wave: Physical Layer Principles and Performance Evaluation
IEEE Access, 2023 Link reliability and enhanced coverage are the primitive concerns of Low-Power Wide-Area Networks (LPWANs) for suitability to critical Internet of Things (IoT) applications.
Zaid Ahmad +5 more
doaj +1 more source
Engineering Reports, Volume 5, Issue 12, December 2023., 2023 This article has been presented with imperative and up‐to‐date information about authenticating end‐to‐end data transmission among secondary users' needs a large amount of power, leading to harmful interference to primary users. To overcome such massive energy consumption, significant bandwidth efficiency is always a key concern; thus, in this research,
Hirak Mazumdar +2 more
wiley +1 more source
Inter-Relay Interference Mitigation for Chirp-Based Two-Path Successive Relaying Protocol
Sensors, 2019 Since the chirp spread spectrum (CSS) system is considered as a communication technology for the Internet of things (IoT), long-range communication and a high data rate are required.
Kwang-Yul Kim, Yoan Shin
doaj +1 more source
Adaptive Multi-Channels Allocation in LoRa Networks
IEEE Access, 2020 In this paper, we consider an IoT dedicated network corresponding to a non licensed LoRa Low Power Wide Area Network. The LoRa network operates in the unlicensed 868 MHz band within a total bandwidth of 1 MHz divided into 8 orthogonal channels of 125 kHz
Yi Yu +6 more
doaj +1 more source
Towards Battery-Free Wide Area Network With Ultra-Low Voltage Chirp Spread Spectrum Modulation [PDF]
, 2022 Next generation of wireless sensors networks is poised to operate at zero-power. To reach this goal while operating over long range, there is a need for ultra-efficient RF transmitter and associated modulation techniques.
FERRE, Guillaume +3 more
core +1 more source