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In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency).
Artículo principal: Frecuencia modulada pulsada. Se trata de una técnica de modulación en espectro ensanchado menos común que las anteriores, en la que se emplea un pulso que barre todas las frecuencias, llamado chirp, para expandir la señal espectral.
Alireza Maleki, Ha H. Nguyen, Ebrahim Bedeer, and Robert Barton. Abstract—Chirps spread spectrum (CSS) modulation is the heart of long-range (LoRa) modulation used in the context of long-range wide area network (LoRaWAN) in internet of things (IoT) scenarios.
Learn how chirp, a long-range radio-frequency technology, can be used to detect and track the location of people, assets, and devices in large-scale facilities. Chirp offers high accuracy, range, reliability, and low-power consumption, especially in industrial environments.
This paper presents a detailed model of chirp spread spectrum (CSS), a low power long range communication standard based on spreading factor 10. It shows that CSS has better robustness against interfering signals than BPSK and that its communication ranges are close to narrowband networks.
13 de ago. de 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 among subchirps.
This paper investigates the performance of chirp signals over air-ground channels that are dispersive and time-varying. It compares a new chirp format with imperfect synchronism to the traditional linear chirp and shows its advantages for multi-user access.
![LoRa's chirp spread spectrum (CSS) [29] | Download Scientific Diagram](https://pe.images.search.yahoo.com/search/images?p=chirp+spread+spectrum&nojs=1&ei=UTF-8&age=1m&fr=yhs-Elex-elex_22find&th=94.5&tw=135.8&imgurl=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FMuhammad-Danladi-2%2Fpublication%2F363810711%2Ffigure%2Ffig1%2FAS%3A11431281086018521%401664032617439%2FLoRas-chirp-spread-spectrum-CSS-29.jpg&rurl=https%3A%2F%2Fwww.researchgate.net%2Ffigure%2FLoRas-chirp-spread-spectrum-CSS-29_fig1_363810711&size=29KB&name=LoRa%27s+chirp+spread+spectrum+%28CSS%29+%5B29%5D+%7C+Download+Scientific+Diagram&oid=3&h=386&w=553&turl=https%3A%2F%2Ftse1.mm.bing.net%2Fth%3Fid%3DOIP.18PaAm2wr-FsNPK4VgU6kwHaFK%26pid%3DApi%26rs%3D1%26c%3D1%26qlt%3D95%26w%3D135%26h%3D94&tt=LoRa%27s+chirp+spread+spectrum+%28CSS%29+%5B29%5D+%7C+Download+Scientific+Diagram&sigr=1J2abpqfGIzR&sigit=plBUjwgFnlun&sigi=F97XrcHtkg65&sign=v4zs9na5pWTD&sigt=v4zs9na5pWTD "LoRa's chirp spread spectrum (CSS) [29] | Download Scientific Diagram")
