Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Upsampling01:22

Upsampling

204
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
204
Downsampling01:20

Downsampling

131
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
131
Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

207
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
207
Bandpass Sampling01:17

Bandpass Sampling

162
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
162
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

85
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
85
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

174
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
174

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nanoscale Antiferromagnetic Domain Imaging using Full-Field Resonant X-ray Magnetic Diffraction Microscopy.

Advanced materials (Deerfield Beach, Fla.)·2022
Same author

The flying spider-monkey tree fern genome provides insights into fern evolution and arborescence.

Nature plants·2022
Same author

Ruptured pseudoaneurysm of the internal maxillary artery in zygomaticomaxillary fracture: a case report.

Archives of craniofacial surgery·2022
Same author

H-lignin can be deposited independently of CINNAMYL ALCOHOL DEHYDROGENASE C and D in Arabidopsis.

Plant physiology·2022
Same author

Mitigation of scintillation in FSO communication using a temporally and spatially incoherent spectrum-sliced light source.

Optics letters·2022
Same author

Changes in the chemical, physical, and sensory properties of rice according to its germination rate.

Food chemistry·2022

Related Experiment Video

Updated: Jun 7, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.6K

Sub-rate sampled, non-integer fractionally spaced Volterra nonlinear equalizer for IM/DD systems.

Jaeyoon Kim, Hoon Kim

    Optics Express
    |November 14, 2024
    PubMed
    Summary

    This study introduces a sub-rate sampled Volterra nonlinear equalizer (VNLE) for optical communication systems. This novel equalizer reduces receiver complexity by eliminating digital upsampling, crucial for low-cost, high-speed systems.

    More Related Videos

    Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
    15:25

    Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

    Published on: February 4, 2018

    6.1K
    Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
    08:32

    Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

    Published on: January 28, 2022

    2.3K

    Related Experiment Videos

    Last Updated: Jun 7, 2025

    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
    09:01

    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

    Published on: April 4, 2017

    8.6K
    Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
    15:25

    Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

    Published on: February 4, 2018

    6.1K
    Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
    08:32

    Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

    Published on: January 28, 2022

    2.3K

    Area of Science:

    • Optical Communications
    • Digital Signal Processing
    • Integrated Circuit Design

    Background:

    • High-speed analog-to-digital converters (ADCs) are costly in intensity-modulation/direct-detection (IM/DD) systems.
    • Conventional nonlinear equalizers require digital upsampling, increasing processing demands.
    • Current receiver designs face a mismatch between low-rate ADCs and higher-rate equalization.

    Purpose of the Study:

    • To propose and demonstrate a sub-rate sampled, non-integer fractionally spaced Volterra nonlinear equalizer (VNLE).
    • To reduce digital signal processing (DSP) complexity in optical receivers.
    • To enable receiver DSP to operate at the ADC's sub-rate sampling frequency.

    Main Methods:

    • Developed a sub-rate sampled, non-integer fractionally spaced Volterra nonlinear equalizer (VNLE).
    • Eliminated the need for digital upsampling in the receiver DSP chain.
    • Evaluated equalizer performance and implementation complexity using multiplier count.
    • Tested the VNLE on a 64-Gb/s 4-ary pulse amplitude modulation (4-PAM) link.

    Main Results:

    • The proposed VNLE operates at the ADC's sub-rate, matching its sampling frequency.
    • Significant reduction in implementation complexity due to obviated digital upsampling.
    • A very slight performance degradation was observed compared to conventional VNLEs.
    • Demonstrated feasibility on a 64-Gb/s 4-PAM optical link.

    Conclusions:

    • The sub-rate sampled VNLE effectively reduces receiver DSP complexity and cost.
    • This approach is suitable for future high-speed, cost-sensitive optical communication systems.
    • The trade-off between complexity reduction and minimal performance loss is acceptable.