Results 61 to 70 of about 1,184 (161)
IEEE AccessFor optical communication, the transmitted signal must be real-valued that can be achieved by employing Hermitian symmetry (HS). But the HS results in increased power consumption and decreased spectral efficiency (SE). Therefore, a HS free asymmetrically
Vijaya Durga Chintala +4 more
doaj +1 more source
Single-input Multiple-output Tunable Log-domain Current-mode Universal Filter [PDF]
, 2013 This paper describes the design of a current-mode single-input multiple-output (SIMO) universal filter based on the log-domain filtering concept.
Dejhan, K., Prommee, P.
core +1 more source
Analogue to Digital and Digital to Analogue Converters (ADCs and DACs): A Review Update [PDF]
, 2016 This is a review paper updated from that presented for CAS 2004. Essentially, since then, commercial components have continued to extend their performance boundaries but the basic building blocks and the techniques for choosing the best device and ...
Pickering, J.
core +3 more sources
EURASIP Journal on Wireless Communications and NetworkingVisible 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 +2 more
doaj +1 more source
A Joint Linearization/Companding Approach for Improving a CO-OFDM Transmitter
, 2015 International audience—The joint use of peak-to-average power ratio (PAPR) reduction and linearization via digital predistortion is investigated in this letter, with the view to improve the performances of coherent optical OFDM (CO-OFDM) systems ...
Azou, Stéphane +6 more
core +3 more sources
Optimal analog wavelet bases construction using hybrid optimization algorithm [PDF]
, 2016 An approach for the construction of optimal analog wavelet bases is presented. First, the definition of an analog wavelet is given. Based on the definition and the least-squares error criterion, a general framework for designing optimal analog wavelet ...
He, Yigang, Li, Hongmin, Sun, Yichuang
core +3 more sources
Streaming an image through the eye: The retina seen as a dithered scalable image coder [PDF]
, 2012 We propose the design of an original scalable image coder/decoder that is inspired from the mammalians retina. Our coder accounts for the time-dependent and also nondeterministic behavior of the actual retina.
Antonini, Marc +2 more
core +6 more sources
PAPR in AFDM: Upper Bound and Reduction With Normalized μ-Law Companding
IEEE AccessAffine Frequency Division Multiplexing (AFDM) is an advanced waveform technique designed for environments with significant Doppler shifts and time-frequency dispersion.
Vundela Madhava Reddy +1 more
doaj +1 more source
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
Group-theoretic structure of linear phase multirate filter banks
, 2013 Unique lifting factorization results for group lifting structures are used to characterize the group-theoretic structure of two-channel linear phase FIR perfect reconstruction filter bank groups. For D-invariant, order-increasing group lifting structures,
Brislawn, Christopher M.
core +1 more source