Results 61 to 70 of about 1,404 (166)

Least mean M -estimate algorithms for robust adaptive filtering in impulse noise [PDF]

, 2000
This paper proposes two gradient-based adaptive algorithms, called the least mean M-estimate and the transform domain least mean M -estimate (TLMM) algorithms, for robust adaptive filtering in impulse noise. A robust M -estimator is used as the objective
Chan, SC, Ng, TS, Zou, Y
core   +1 more source

Efficient Digital Signal Processing Techniques and Architectures for On-Board Processors [PDF]

, 2016
In this paper, we present a number of algorithmic and architectural DSP solutions to be incorporated in digital OBPs for communication satellites to boost the system performance primarily in terms of reducing their power consumption.
Angeletti, P., Angeletti, P., Brown, S., Brown, S., Coskun, A., Coskun, A., Hughes, R., Hughes, R., Kale, I., Kale, I., Morling, R.C.S., Morling, R.C.S.   +11 more
core  

An efficient hardware architecture for a neural network activation function generator [PDF]

, 2006
This paper proposes an efficient hardware architecture for a function generator suitable for an artificial neural network (ANN). A spline-based approximation function is designed that provides a good trade-off between accuracy and silicon area, whilst ...
B. Widrow, D. Zhang, D.J. Myers, G. Cauwenberghs, H. Amin, H. Faiedh, I. Koren, J. Holt, J. Pineiro, K. Basterretxea, M. Tommiska, S. Draghici, S. Haykins, S. Vassiliadis, U. Ruckert   +14 more
core   +1 more source

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   +1 more source

Logarithmic Companding Technique to Improve Performance of SC-FDMA Systems

Indian Journal of Science and Technology, 2016
Objectives: This paper proposes logarithmic companding technique to improve PAPR and BER performance of conventional Single Carrier Frequency Division Multiple Access (SC-FDMA) system. Methods/Analysis: The lower signal envelope fluctuations in SC-FDMA signal results in low peak to average power ratio, in contrast to that of OFDMA.
K. Shri Ramtej, S. Anuradha
openaire   +1 more source

Improved scheme of asymmetrically clipped optical-orthogonal frequency division multiplexing (ACO-OFDM) for wireless IM/DD optical systems

Results in Engineering
Visible light communication (VLC) systems that employ optical orthogonal frequency division multiplexing (O-OFDM) face a critical challenge in the form of a high peak-to-average power ratio (PAPR), which limits transmission efficiency and system ...
Mohamed M. Elnabawy, Ehab K I Hamad, Yasser A. Zenhom, Ahmed Z A Zaki, Haytham Gamal, Alaa Rabie, M.B. Badawi, Shuja Ansari, Mahmoud A. Shawky   +8 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, Bejan, Serban, Diouf, Cherif, Morel, Pascal, Sharaiha, Ammar, Tanguy, Noël, Telescu, Mihai   +6 more
core   +3 more sources

PERANCANGAN UPGRADEABLE DIGITAL ANSWERING MACHINE BERBASIS TEKNOLOGI FPGA [PDF]

, 2002
Mesin penjawab telepon digital menggunakan chip-chip memori media penyimpanan informasi (pesan)
Baki, Siti Halimah, Sugiarto, Indar
core  

Optical OTFS waveform PAPR analysis for high order modulation employing CNN, DNN, and AE machine learning algorithms under a variety of channel scenarios

Physics Open
Optical orthogonal time–frequency space (OTFS) modulation is a future technique for optical wireless communication with high mobility. Nevertheless, the high peak-to-average power ratio (PAPR) of OTFS modulation severely degrades the system performance ...
Arun Kumar, Nishant Gaur, Aziz Nanthaamornphong   +2 more
doaj   +1 more source

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   +1 more source