Results 121 to 130 of about 145,584 (294)

Antimultipath communication by injecting tone into null in signal spectrum [PDF]

, 1987
A transmitter for digital radio communication creates a null by balanced encoding of data modulated on an RF carrier, and inserts a calibration tone within the null. This is accomplished by having the calibration tone coincide in phase and frequency with
Davarian, Faramaz
core   +1 more source

Analytical evaluation of equivalent energy loss in causal frequency selection filters in the processing of quadrature amplitude modulation signals

, 2020
V. G. Andronov, I. Е. Mukhin, I. G. Babanin, A. E. Sevryukov, D. S. Koptev, A. A. Chuev   +5 more
openalex   +1 more source

The effects of the cross-entropy stopping criterion and quadrature amplitude modulation on iterative turbo decoding performance

, 2021
Roslina Mohamad, Mohamad Yusuf Mat Nasir, Nuzli Mohamad Anas   +2 more
openalex   +2 more sources

Synchronization techniques for all digital 16-ary QAM receivers operating over land mobile satellite links [PDF]

The performance of a low bit rate (64 Kb/s) all digital 16-ary Differentially Encoded Quadrature Amplitude Modulation (16-DEQAM) demodulator operating over a mobile satellite channel, is considered.
Aghvami, A. H., Fines, P.
core   +1 more source

Enabling Spatial Multiplexing in Guided Waves-based Communication: the case of Quadrature Amplitude Modulation realized via Discrete Frequency Steerable Acoustic Transducers

, 2022
Masoud Mohammadgholiha, Federica Zonzini, Luca De Marchi   +2 more
openalex   +2 more sources

Generalized Secure Superchannels: A Signal Encryption Framework

IEEE Access
In this work, we propose a comprehensive technique to enhance the security of superchannels (SCs). The spectral samples of the signals within a superchannel are shuffled and further encrypted in amplitude and phase, according to cryptographic keys.
Marcelo L. F. Abbade, Marcelo P. Nogueira, Luiz H. Bonani, Eric A. M. Fagotto, Plinio S. Dester, Wilian M. Dos Santos, Ivan Aldaya   +6 more
doaj   +1 more source

Performance Evaluation and Simulation of M-Ary Quadrature Amplitude Modulation Schemes with VisSim/Comm Software

, 2019
Husham Jawad Ahmad
openalex   +2 more sources

M-ARRAY QUADRATURE AMPLITUDE MODULATION WIRELESS SENSOR NETWORK MODULATOR RELIABILITY AND ACCURACY ANALYZE IN CIVIL SHM [PDF]

, 2013
Md Ershadul Haque
openalex   +1 more source

Modulation Classification for Overlapped Signals Using Deep Learning

IEEE Open Journal of the Communications Society
Modulation recognition (MR) plays a pivotal role in tasks encompassing spectrum management, security enforcement, and interference mitigation. This research work introduces a deep learning-based MR method tailored for completely overlapped multi-user (MU)
Gaurav Jajoo, Prem Singh
doaj   +1 more source