Results 111 to 120 of about 46,791 (149)

Double-gain backscatter modulation based on chirp spread spectrum signals

IEEE International Conference on RFID-Technologies and Applications, 2022
This work presents an improved active backscatter tag based on a double processing gain modulation. All wireless communications remain subject to trade-offs between range, power consumption, and data rate.
Marc Lazaro Marti, A. Lázaro, R. Villarino, David Girbau Sala   +3 more
semanticscholar   +1 more source

Chirp-Like Polyphase Sequence Based Discrete Circulant Transform Spread OFDM for Bandwidth-Limited IM/DD Systems

Journal of Lightwave Technology, 2022
We propose and investigate chirp-like polyphase sequence (CLPS) based discrete circulant transform spread (DCrT-S) OFDM in bandwidth-limited intensity-modulation and direct-detection systems.
Z. Fan, Jian Zhao
semanticscholar   +1 more source

Non-Binary PRN-Chirp Modulation: A GNSS Fast Acquisition Signal Waveform

IEEE Communications Letters, 2022
In this letter, we propose a new non-binary modulation which allows both Global Navigation Satellite Systems (GNSS) synchronization and the demodulation of non-binary symbols, without the need of a pilot signal, with the aim to provide a fast first ...
L. Ortega, J. Vilà‐Valls, É. Chaumette   +2 more
semanticscholar   +1 more source

A System-Theoretic View on Breathing Detection Using Chirp Sequence Modulated Radar Sensors

2017 New Generation of CAS (NGCAS), 2017
When charging electric vehicles inductively, living objects must be prevented from being exposed to the magnetic field. Therefore, additional sensors are used to detect endangered objects under the vehicle. This ensures that the charging process can be stopped immediately if endangered objects stay inside the hazardous zone.
Tim Poguntke, Davi Duarte de Carvalho Filho, Karlheinz Ochs   +2 more
openaire   +1 more source

Frequency Chirp Supported Complex Modulation of Directly Modulated Lasers

Journal of Lightwave Technology, 2016
Di Che, Feng Yuan, William Shieh
exaly   +2 more sources

Communication-Assisted Chirp Sequence Radar With Improved Data Rate

IEEE Microwave and Wireless Technology Letters
This letter presents a novel communication-assisted chirp sequence radar (CaCSR) system with an improved communication data rate, where part of each chirp is modulated with communication symbols.
Mohamad Basim Alabd, Lucas Giroto De Oliveira, Benjamin Nus   +2 more
exaly   +2 more sources

Range migration compensation for chirp-sequence based radar

German Microwave Conference, 2016
Fabian Roos, Nils Appenrodt, Christian Waldschmidt   +2 more
exaly   +2 more sources

Impact of an Automotive Chirp-Sequence Interferer on a Wideband Pseudo-Noise Radar

International Conference on Electromagnetics in Advanced Applications, 2019
Interference is a main problem for automotive radar sensors, as it may limit the maximum range and create ghost targets. With an increasing number of radar sensors, the probability of interference increases drastically.
Simon Stephany, B. Schweizer, Christina Knill, C. Waldschmidt   +3 more
semanticscholar   +1 more source

Joint Radar-Communication Systems: Modulation Schemes and System Design

IEEE transactions on microwave theory and techniques, 2022
The joint radar-communication (RadCom) concept has been continuously gaining interest due to the possibility of integrating radar sensing and communication functionalities in the same radio frequency hardware platform.
Lucas Giroto de Oliveira, Benjamin Nuss, Mohamad Basim Alabd, A. Diewald, M. Pauli, T. Zwick   +5 more
semanticscholar   +1 more source

Dual-chirp waveform generation and its TBWP improvement based on polarization modulation and phase coding

, 2020
A photonics approach to generate a phase-coded dual-chirp waveform with reconfigurable time duration, arbitrary large TBWP, flexible tuning frequency and bandwidth is proposed and demonstrated.
Xuan Li, Shanghong Zhao, Kun Zhang, Guodong Wang   +3 more
semanticscholar   +1 more source