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
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Performance improvement of a SOA-based coherent optical-OFDM transmission system via nonlinear companding transforms [PDF]
, 2015 International audienceCoherent-Optical OFDM systems are known to be sensitive to large peak-to-average power ratio (PAPR) at the transmitter output, due to nonlinear properties of some components involved in the transmission link.
Azou, Stéphane +3 more
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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
Analysis of Improved µ-Law Companding Technique for OFDM Systems [PDF]
, 2017 YesHigh Peak-to-Average-Power Ratio (PAPR) of transmitted signals is a common problem in broadband telecommunication systems using an orthogonal frequency division multiplexing (OFDM) modulation scheme, as it increases transmitter power consumption.
Abd-Alhameed, Raed A. +4 more
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Non-Linear Companding Transform aided MIMO-OFDM Systems
IOSR Journal of Electronics and Communication Engineering, 2014 In this paper a new non-linear companding transform (NCT) technique based on inverse hyperbolic cosine function is proposed and implemented along with new Intercarrier interference reduction technique to improve the performance of Multi Input and Multi Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system in terms of Peak-to-Average ...
K. Srinivasa Rao, B. Prabakararao
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Research of Companding Transform Combines with Improving PTS
Procedia Engineering, 2011 AbstractThe orthogonal frequency division multiplexing uses as a high-speed information transmission technology, with excellent anti-interference capabilities, which also has its own shortcomings, such as high peak-to-average power ratio. In order to reduce hardware complexity and enhance the quality of transmission, there are methods about reducing ...
Zhi-dong, Xiao +2 more
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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.
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Walsh‐Hadamard‐transform‐based SC‐FDMA system using WARP hardware
ETRI Journal, 2021 Single‐carrier frequency division multiple access (SC‐FDMA) is currently being used in long‐term evolution uplink communications owing to its low peak‐to‐average power ratio (PAPR). This study proposes a new transceiver design for an SC‐FDMA system based
Shri Ramtej Kondamuri, Sundru Anuradha
doaj +1 more source
Throughput-Distortion Computation Of Generic Matrix Multiplication: Toward A Computation Channel For Digital Signal Processing Systems [PDF]
, 2011 The generic matrix multiply (GEMM) function is the core element of high-performance linear algebra libraries used in many computationally-demanding digital signal processing (DSP) systems.
Anastasia, Davide, Andreopoulos, Yiannis
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Non‐linear companding transform for DCO‐OFDM‐based VLC systems [PDF]
IET Communications, 2019 In this study, a novel non‐linear companding transform (NCT) is proposed for the DC‐biased optical orthogonal frequency division multiplexing (DCO‐OFDM) based visible light communications (VLC). The authors lower the peak‐to‐average power ratio (PAPR) of the original DCO‐OFDM signals to mitigate the transmission performance ...
Duqiang Xin +3 more
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