Results 31 to 40 of about 1,404 (166)
Enhancement of Analytical OBR (Out of Band Radiation) and BER Calculation for Digital Au-dio-Video Broadcasting in Companded OFDM System using Non-Symmetric QAM/QPSK Tecniques [PDF]
, 2017 Companding transforms useful under assumption of infinite bandwidth. Under band limited conditions OBR parameter filters out. So bandwidth is a factor that decides the filter-ing out OBR on the performance of companded OFDM sys-tems.
Arora, P. K. (Prof) +2 more
core +1 more source
Reversible Data Hiding for DICOM Image Using Lifting and Companding
Cryptography, 2019 In this work, a reversible watermarking technique is proposed for DICOM (Digital Imaging and Communications in Medicine) image that offers high embedding capacity (payload), security and fidelity of the watermarked image.
Amit Phadikar +2 more
doaj +1 more source
Root-Based Nonlinear Companding Technique for Reducing PAPR of Precoded OFDM Signals
IEEE Access, 2018 Orthogonal frequency division multiplexing (OFDM) signals are characteristically independent and identically distributed Gaussian random variables that follow Rayleigh distribution. The signals also exhibit high peak-to-average power ratio (PAPR) problem
Kelvin Anoh +3 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 +2 more
doaj +1 more source
The Journal of Engineering, Volume 2019, Issue 5, Page 3460-3468, May 2019., 2019 Partial transmit sequence (PTS) is one of the effective techniques for reducing the peak‐to‐average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. PTS technique has some issues such as higher computational complexity due to its exhaustive searching of optimal phase factors.
Sanjana Prasad, Ramesh Jayabalan
wiley +1 more source
High-Resolution Scalar Quantization with Rényi Entropy Constraint [PDF]
, 2011 We consider optimal scalar quantization with $r$th power distortion and constrained R\'enyi entropy of order $\alpha$. For sources with absolutely continuous distributions the high rate asymptotics of the quantizer distortion has long been known for ...
Kreitmeier, Wolfgang, Linder, Tamas
core +1 more source
Journal of Computer Networks and Communications, Volume 2019, Issue 1, 2019., 2019 Orthogonal frequency division multiplexing (OFDM) is the highly spectrally well‐organized method that has the difficulty of excessive peak power to average power ratio (PAPR), which ultimately imposes constraints on the high‐power amplifier. Many practices have been projected to lessen PAPR of the OFDM systems.
Prabal Gupta +5 more
wiley +1 more source
Zero-Delay Joint Source-Channel Coding in the Presence of Interference Known at the Encoder [PDF]
, 2016 Zero-delay transmission of a Gaussian source over an additive white Gaussian noise (AWGN) channel is considered in the presence of an additive Gaussian interference signal.
Ertem, T, Gunduz, D, Varasteh, M
core +1 more source
Journal of Electrical and Computer Engineering, Volume 2018, Issue 1, 2018., 2018 A data clipping and normalization technique is employed to improve the performance of the overall direct detection optical orthogonal frequency division multiplexing (DCO‐OFDM) system. A detailed analysis of clipping distortion introduced by digital clipping and normalization is provided. The normalization operation amplifies the clipped data signal to
Jiang Wu, Zhongpeng Wang, Jit S. Mandeep
wiley +1 more source
MC CDMA PAPR Reduction Techniques using Discrete Transforms and Companding
International Journal of Distributed and Parallel systems, 2011 18 pages,16 figures; International journal of Distributed and Parallel Systems volume 2, number 6, Novmber 2011,ISSN:0976 ...
Sarala, B., Venkateswarulu, D. S.
openaire +3 more sources