Results 81 to 90 of about 2,083,913 (216)
IEEE Access, 2017 This paper introduces a novel approach to incorporate the time compression overlap-add (TC-OLA) technique used in communication systems into linear frequency modulation pulse compression (LFM-PC) radar systems.
Ahmed Youssef +3 more
doaj +1 more source
The Journal of Physiology, EarlyView.Abstract figure legend Temporal scaling physiology differs significantly between mice and humans. Mice have higher metabolism, heart and respiratory rate, as well as faster blood flow rates, brain activity and physiological dynamics over time. These differences influence the temporal resolution needed in preclinical imaging of mouse models to ...
Sara Gargiulo, Matteo Gramanzini
wiley +1 more source
, 2009 The fractional Fourier transform (FRFT) is one among the most efficient techniques for digital signal processing of linear frequency modulated (LFM) signal applications. Chirp (or LFM) modulation spread spectrum (CMSS) with FRFT technique is employed for
Mahesh, H.M. +7 more
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LoRa Mobile-To-Base-Station Channel Characterization in the Antarctic
Sensors, 2017 Antarctic conditions demand that wireless sensor nodes are operational all year round and that they provide a large communication range of several tens of kilometers.
Johnny Gaelens +3 more
doaj +1 more source
Journal of Agronomy and Crop Science, Volume 212, Issue 6, November 2026.ABSTRACT The use of saline water for irrigation is increasing as the quantity and quality of irrigation water resources are declining. Saline irrigation also provides a means to investigate crop responses to heterogenous salinity, which is a common occurrence in agricultural fields. Crop responses to salinity are dose‐ and genotype dependent, providing
Johanna Volk +2 more
wiley +1 more source
, 1988 The work presented in this dissertation examines the performance of two satellite radio communication systems by computer simulation. Two simulations were separately performed for a spread spectrum chirp system as an analog communications system, and for
Kim, Junghwan
core
A Mechanism for Analyzing the Energy Consumption and Environmental Impact of LoRa Sensors Over Time
International Journal of Communication Systems, Volume 39, Issue 15, October 2026.An SPN‐based mechanism, validated against NS‐3 with MAPE below 0.3%, reveals how packet generation rate and spreading factor shape LoRa sensor lifetime, energy consumption, and operational CO2$$ {}_2 $$ emissions, supporting sustainable planning of large‐scale IoT deployments. ABSTRACT Long Range (LoRa) sensors are widely adopted in Internet of Things (
Vandirleya Barbosa +5 more
wiley +1 more source
A novel mobile communication system using Pulse Position based Chirp Spread Spectrum modulation
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
Study of a Frugal Design Picosecond Laser System for Laser‐Assisted Corneal Surgery
Journal of Biophotonics, Volume 19, Issue 10, October 2026.Stromal surface after extraction of the lamella cut with the studied frugal picosecond laser source. ABSTRACT Femtosecond lasers have long been the gold standard for corneal laser‐assisted surgery, but their high cost limits widespread use. This study challenges their supremacy by investigating a cost‐effective alternative: a frugal all‐fiber ...
Maxime Quirke +9 more
wiley +1 more source
International Journal of Distributed Sensor Networks, 2014 Location awareness is a core capability in many context-aware computing platforms. Multiple existing systems either provide inadequate accuracy or require extensive calibration or preexisting measurements in order to be functional.
Olga E. Segou, Stelios C. A. Thomopoulos
doaj +1 more source