Results 21 to 30 of about 10,890,806 (175)

Low-Voltage CMOS Log-Companding Techniques for Audio Applications [PDF]

Analog Integrated Circuits and Signal Processing, 2004
This paper presents a collection of novel current-mode circuit techniques for the integration of very low-voltage (down to 1 V) low-power (few hundreds of μA) complete SoCs in CMOS technologies. The new design proposal is based on both, the Log Companding theory and the MOSFET operating in subthreshold.
Serra Graells, Francesc, Rueda Rueda, Adoración, Huertas Díaz, José Luis   +2 more
openaire   +5 more sources

Improving bit error rate in optical wireless OFDM systems through hybrid companding and precoding strategies

EURASIP Journal on Wireless Communications and Networking
Visible light communication (VLC) is a promising wireless high-data-rate transmission technology that uses visible light. Optical Orthogonal Frequency Division Multiplexing (OOFDM)-based systems, especially asymmetrically clipped optical OFDM (ACO-OFDM),
Amal Yasser, Albashir A. Youssef, Mohamed Abaza   +2 more
doaj   +2 more sources

Research on Digital Steganography and Image Synthesis Model Based on Improved Wavelet Neural Network. [PDF]

Comput Intell Neurosci, 2022
Network compression coding technology is a research hotspot in the field of digital steganography and image synthesis. How to improve image quality while achieving short compression time is a problem currently faced. Based on the improved wavelet neural network theory, this paper constructs a digital steganography and image synthesis model.
Li X, Yao R, Lee J.
europepmc   +2 more sources

Reducing peak-to-average power ratio of filtered non-orthogonal multiple access and new radio 5g waveforms using hybrid partial transmit sequence-companding technique

ETRI Journal
For fifth-generation (5G) and beyond 5G communications, filtered nonortho-gonal multiple access (F-NOMA) can be used as a waveform contender. Filtering-based waveform frameworks provide suppression of out-of-band emission (OOBE) and asynchronous ...
Arun Kumar, Karthikeyan Rajagopal, Nishant Gaur, Aziz Nanthaamornphong   +3 more
doaj   +2 more sources

Speech Technology Progress Based on New Machine Learning Paradigm. [PDF]

Comput Intell Neurosci, 2019
Speech technologies have been developed for decades as a typical signal processing area, while the last decade has brought a huge progress based on new machine learning paradigms. Owing not only to their intrinsic complexity but also to their relation with cognitive sciences, speech technologies are now viewed as a prime example of interdisciplinary ...
Delić V, Perić Z, Sečujski M, Jakovljević N, Nikolić J, Mišković D, Simić N, Suzić S, Delić T.   +8 more
europepmc   +2 more sources

Peak to Average Power Ratio Reduction in UFMC System Using Pre -Coding and Nonlinear Companding Techniques

INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT, 2023
Universal Filtered Multi-Carrier (UFMC) is a versatile fifth-generation communication technology that can be utilized in Internet of Things and Machine-to- Machine (M2M) communication to enhance connectivity and efficiency because of its spectral ...
Ijsrem Journal
semanticscholar   +1 more source

The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions. [PDF]

Earth Space Sci, 2017
Abstract The Mars Science Laboratory Mast camera and Descent Imager investigations were designed, built, and operated by Malin Space Science Systems of San Diego, CA. They share common electronics and focal plane designs but have different optics. There are two Mastcams of dissimilar focal length. The Mastcam‐34 has an f/8, 34 mm focal length lens, and
Malin MC, Ravine MA, Caplinger MA, Tony Ghaemi F, Schaffner JA, Maki JN, Bell JF, Cameron JF, Dietrich WE, Edgett KS, Edwards LJ, Garvin JB, Hallet B, Herkenhoff KE, Heydari E, Kah LC, Lemmon MT, Minitti ME, Olson TS, Parker TJ, Rowland SK, Schieber J, Sletten R, Sullivan RJ, Sumner DY, Aileen Yingst R, Duston BM, McNair S, Jensen EH.   +28 more
europepmc   +2 more sources

A Novel Companding Technique to Reduce High Peak to Average Power Ratio in OFDM Systems

IEEE Access, 2021
The reduction of the high peak-to-average-power ratio (PAPR) is important to the efficiency of the orthogonal frequency division multiplexing (OFDM) technique.
Abdulwahid Mohammed, Tawfik Ismail, Amin Nassar, Hassan Mostafa   +3 more
doaj   +1 more source

PAPR and BER analysis of coded FBMC-OQAM system with non-linear companding techniques

Engineering Research Express, 2022
Filter Bank Multicarrier with offset QAM (OQAM) is a suitable multicarrier waveform technique for 5 G and future wireless networks and standards. Being a multicarrier technique, it suffers from high peak-to-average-power ratio (PAPR) problem.
A. Mobin, Anwar Ahmad
semanticscholar   +1 more source

Hybrid clipping and companding techniques based peak to average power ratio reduction in orthogonal frequency division multiplexing based differential chaos shift keying system

International Journal of Electrical and Computer Engineering (IJECE), 2022
In this paper, a hybrid approach using clipping and companding techniques is introduced to reduce the peak to average power ratio (PAPR) of orthogonal frequency division multiplexing based differential chaos shift keying (OFDM-DCSK), which is the major ...
Sejjad Razzaq Alqassab, F. S. Hasan
semanticscholar   +1 more source