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1 de may. de 2024 · High spectral efficiency as compared to other double sideband modulation schemes, spread spectrum, etc. Can easily adapt to severe channel conditions without complex time-domain equalization. Robust against narrow-band co-channel interference; Robust against intersymbol interference (ISI) and fading caused by multipath propagation
Hace 2 días · Embracing the Spectrum: Understanding Spread Spectrum Technology-AmpliVisionS-Spread Spectrum (SS) is a revolutionary communication technique that disperses the frequency spectrum of transmission signals over a wider bandwidth than their original range.
17 de abr. de 2024 · The study presents a spread spectrum embedding technique with chaotic encryption, aimed at increasing security and imperceptibility of messages in stego images. While this approach enhances the message embedding process, it does not address the potential distortion in the cover image or the error rates in recovered messages.
15 de abr. de 2024 · The use of Chirp Spread Spectrum (CSS) has recently been proposed for time dissemination on distribution networks, with reported timing accuracy of 7.5 μs 8, making it suitable for most smart...
16 de abr. de 2024 · The proposed beacon spread-spectrum scheme mitigates the limitations of hardware reception sensitivity and position-detection precision, demonstrating its potential application in high-precision detection in long-distance interstellar laser communication.
Hace 3 días · “The foundation of the MUOS architecture is a direct sequence spread spectrum WCDMA waveform leveraged from 3G commercial mobile technologies.” “WCDMA [wideband code division multiple access] offers adaptive power control to provide the required quality of service to each user while simultaneously maximizing system capacity.
6 de may. de 2024 · For hybrid direct sequence/frequency hopping (DS/FH) spread spectrum signals, even if the relative motion speed between the transmitter and receiver remains constant, the Doppler frequency will vary due to the continuous hopping of the carrier frequency. Under high dynamic conditions, the first-order and second-order change rates of the Doppler frequency attached to the received signal further ...
