Results 71 to 80 of about 2,477 (201)

Log-domain All-pass Filter-based Multiphase Sinusoidal Oscillators [PDF]

, 2013
Log-domain current-mode multiphase sinusoidal oscillators based on all-pass filters are presented in this paper. The first-order differential equation is used for obtaining inverting and non-inverting all-pass filters.
Prommee, P., Wongprommoon, N.
core  

Reduction of peak-to-average power ratio for FBMC/OQAM signals under the general linear non-symmetrical companding transform with a Laplace distribution

ICT Express
The filter bank multi-carrier with offset quadrature amplitude modulation (FBMC/OQAM) is extensively utilized in communication scenarios characterized by severe Doppler interference, owing its remarkable ability for precise time–frequency positioning ...
Xinyu Liu, Hongkun Zhou, Xiyun Ge, Miao Yu, Lei Liu   +4 more
doaj   +1 more source

Performance Analysis of Hybrid Peak to Average Power Ratio Reduction Techniques in 5G UFMC Systems

IEEE Access, 2019
The universal filtered multi-carrier (UFMC) technique has been proposed as a prominent waveform candidate for fifth generation (5G) communication techniques.
Ali F. Almutairi, Mishal Al-Gharabally, Aparna Krishna   +2 more
doaj   +1 more source

Piecewise companding transform assisted optical-OFDM systems for indoor visible light communications

, 2017
In visible light communications (VLCs) relying on intensity-modulation and direct detection (IM/DD), the conversion from electrical signals to optical signals and the limited dynamic range of the light-emitting diodes (LEDs) constitute the fundamental ...
Hanzo, Lajos, Yang, Lie-Liang, Zhang, Hongming   +2 more
core   +1 more source

Analisa Kualitas Sinyal Suara pada Layanan MailBox Berbasis Teknologi Interactive Voice Response(IVR) [PDF]

, 2010
Salah satu Aplikasi IVR yang diimplementasikan pada layanan mailbox memiliki kegunaan untuk meninggalkan pesan jika penerima telepon tidak ada di rumah. Kendala yang dihadapi adalah kurang jernihnya pesan yang ditinggalkan, sehingga aplikasi IVR tesebut ...
Yuliana, Mieke
core  

Companding and random quantization in several dimensions [PDF]

IEEE Transactions on Information Theory, 1981
The problem of implementing multidimensional quantizers is discussed. A general equation is derived that can be used to evaluate the performance of multidimensional compandors. It is demonstrated that the optimal compandor must be conformal almost everywhere.
openaire   +2 more sources

An FFT-Based Companding Front End for Noise-Robust Automatic Speech Recognition

EURASIP Journal on Audio, Speech, and Music Processing, 2007
We describe an FFT-based companding algorithm for preprocessing speech before recognition. The algorithm mimics tone-to-tone suppression and masking in the auditory system to improve automatic speech recognition performance in noise.
Turicchia Lorenzo, Sarpeshkar Rahul, Raj Bhiksha, Schmidt-Nielsen Bent   +3 more
doaj   +2 more sources

Delta-modulation for the transmission of image data Final report [PDF]

Delta modulation for image data ...
Ehrman, L., Gish, H.
core   +1 more source

The Research on Improved Companding Transformation for Reducing PAPR in Underwater Acoustic OFDM Communication System

Discrete Dynamics in Nature and Society, 2016
To solve the problem of the high peak-to-average power ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) for the underwater acoustic communication system, the paper offers a method of reducing PAPR which combines the amplitude limiting ...
Jinqiu Wu, Gang Qiao, Xiaofei Qi
doaj   +1 more source