Results 61 to 70 of about 322 (180)

Delta modulation techniques for low bit-rate digital speech encoding

, 1985
Includes bibliography.Two new hybrid companding delta modulators for speech encoding are presented here. These modulators differ from the Hybrid Companding Delta Modulator (HCDM) proposed by Un et al in that the two new encoders employ Song Voice ...
Irvine, James Moir
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

C Implementation & comparison of companding & silence audio compression techniques

CoRR, 2010
International Journal of Computer Science Issues online at http://ijcsi.org/articles/C-Implementation-comparison-of-companding-silence-audio-compression-techniques ...
Kruti Dangarwala, Jigar Shah
openaire   +2 more sources

A Companding Technique for PAPR Reduction of OFDM Systems

, 2017
[[abstract]]A companding technique using the hyperbolic tangent transform is proposed for reducing the peak-to-average-power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals.
HAO, Miin-Jong;LIAW, Chung-Ping
core  

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

A Novel Low-Complexity Peak-Power-Assisted Data-Aided Channel Estimation Scheme for MIMO-OFDM Wireless Systems

IEEE Open Journal of Signal Processing
Low-complexity channel estimation techniques are key to enabling efficient, reliable, and real-time communication in modern wireless devices operating under resource and energy constraints.
Inaamullah Khan, Mohammad Mahmudul Hasan, Michael Cheffena   +2 more
doaj   +1 more source

Companding Flash Analog-To-Digital Converters

, 1986
This report will demonstrate how a companding flash analog-to-digital converter can be used to satisfy both the dynamic range and resolution requirements of an infrared imaging system.
Brig, Michael P.
core  

PAPR reduction using a combination between precoding and non-liner companding techniques for ACO-OFDM-based VLC systems

, 2021
Peak-to-average power ratio reduction techniques for visible light communication broadcasting systems are designed, simulated, and evaluated in this work.
Mohammed, N. A., Khalaf, A. A. M., Elnabawy, M. M.   +2 more
core  

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

An investigation into the application of companding to wireless OFDM systems

, 2008
The everyday increase in the demand for high speed mobile multimedia communications requires transmission techniques that are robust to channel hostilities and yet providing higher data rates. Orthogonal Frequency Division Multiplexing (OFDM) promises to
Vallavaraj, Athinarayanan
core