8 Point DIT-FFT Algorithm Using Verilog

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
N. Geetha Rani ◽  
Tazaeen Sundus ◽  
Munagala Vineela
Keyword(s):  
Communication System ◽  
Digital Video ◽  
Digital Signal ◽  
Vital Role ◽  
Linear Filtering ◽  
Signal Method ◽  
Algorithmic Rule

The importance of Digital Signal method (DSP) algorithms has increased drastically in recent times, the two very important techniques of DSP unit the Distinct Fourier rework (DFT) and thus the fast Fourier rework (FFT). DFT is mostly utilized within the applications sort of convolution, a linear filtering etc. Another algorithmic rule to reason DFT efficiently is that the fast Fourier remodels (FFT). Fast Fourier rework processor incorporates a vital role inside the sphere of communication system like audio broadcasting and digital video etc.

Performance Analysis of DQPSK Modulated RoF System

2014 ◽  
Vol 0 (0) ◽  
Author(s):  
Ramandeep Kaur ◽  
Kamaljit singh Bhatia
Keyword(s):  
Performance Analysis ◽  
Phase Shift ◽  
Communication System ◽  
Vital Role ◽  
Phase Shift Keying ◽  
Fiber System ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying ◽  
Radio Over Fiber System

AbstractAdvanced modulation schemes play a vital role for RoF communication system for different channels. Keeping into view the same, in this paper a DQPSK (Differential Quadrature Phase Shift Keying) based radio over fiber system is proposed. Appropriate value of FWHM is also concluded for faithful communication.

Design of Digital Communication System of XCTD Based on FSK

2014 ◽  
Vol 644-650 ◽  
pp. 3972-3975
Author(s):  
Jian Rui Zhao ◽  
Ning Liu ◽  
Yu Hua Wu
Keyword(s):  
Communication System ◽  
Digital Communication ◽  
Signal Transmission ◽  
Digital Signal ◽  
Single Chip ◽  
Modulation And Demodulation ◽  
Waveform Distortion ◽  
Shift Keying ◽  
Digital Communication System ◽  
Temperature Depth

According to the problem of expendable conductivity temperature depth profile (XCTD) of transmission signal waveform distortion and undistinguishable information caused by cable time-varying parameters and influence of seawater. This paper designed a based on FSK (Frequency shift keying) of digital communication system. It used single-chip modem chip FX604 used in FSK modulation and demodulation of the signal. And it implements the digital signal transmission on thin wire communication on the water. The system overcomes unfavorable conditions about transmission channel and marine environment. The circuit is easy and practical.

Elegant and Efficient Communication by Haiku-Like Concise Sentences

2019 ◽  
pp. 449-468
Author(s):  
Yoshihiko Nitta
Keyword(s):  
Communication System ◽  
Digital Communication ◽  
Digital Signal ◽  
Signal System ◽  
Simple Sentence ◽  
Functional Grammar ◽  
Highly Efficient ◽  
Efficient Communication ◽  
Great Poet ◽  
Digital Communication System

Poetic fragmental sentences such as Haiku are often free from grammatical constraint while maintaining full message transmitting power. The author takes Haiku, a classical Japanese concise poetic sentence, as an elegant and efficient communication language for a digital signal system. By using the functional grammar and season-word ontology, the author will throw light on the secret of efficiency in Haiku-like sentences. It is often said that this efficiency comes from artistic mutism—ellipsis or abbreviation. Various events and situations are narrated in a very short and simple sentence, which is composed of a 5-7-5 pattern of letters, words, or phrases. Haiku-like sentences can be composed in non-Japanese, such as English, French, Chinese, etc. The most important Haiku philosophy is “the universality” (Fueki-Ryukou), which was first told by the great poet Basho in 1689. The benefit of universality is even ranging over the digital communication system. That is, the Haiku-like sentence enables highly efficient and concise communication. You can so much as write a cipher by Haiku.

The Design and Implementation of Infrared Communication System

2014 ◽  
Vol 496-500 ◽  
pp. 2091-2094
Author(s):  
Jia Min Zhou ◽  
Ren Er Yang ◽  
Xu Yan Ni
Keyword(s):  
Communication System ◽  
Audio Signal ◽  
Data Communication ◽  
Digital Signal ◽  
Single Chip ◽  
Wireless Data ◽  
Infrared Communication ◽  
Voice Signal ◽  
Temperature Signal ◽  
Wireless Data Communication

As a kind of wireless communication, Infrared wireless data communication has been developing rapidly and has been widely used in the close wireless data communication. In this paper, there is the design and achievement of infrared communication system, which has realized the short distance transmission of voice and digital signal (temperature signal). The modem part of the system is implemented by the phase locked circuit composed of LM567. At the same time, with the single chip processor as the core, the temperature information which has been encoded is added to the audio signal and then to be transmitted to the receiver to be decoded to restore the temperature information. After the test of implementation, this system can transmit the speech signal and digital signal directly and the voice signal received has no obvious distortion. This system is simple in making and has a good application prospect.

scholarly journals Development of an Efficient Indoor Optical System using Different Wavelet Transforms

2021 ◽  
Author(s):  
Ankita Aggarwal ◽  
Gurmeet Kaur
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Communication System ◽  
Wavelet Transforms ◽  
Low Frequency ◽  
Digital Signal ◽  
Fluorescent Light ◽  
Discrete Wavelet ◽  
Stationary Wavelet Transform ◽  
Light Interference

For an effective communication system whether indoor or outdoor, the most important concern is minimum noise. In this paper, an efficient noise reduction technique is presented using various wavelet transform techniques for indoor optical wireless communication system (IOWC). In IOWC system, Fluorescent Light Interference (FLI) is main source of noise. Here, in this paper three methods are used to reduce the effect of noise from a digital signal. These are Discrete Wavelet Transform (DWT), Stationary Wavelet transform (SWT) and Discrete Wavelet transform-Stationary Wavelet Transform (DWT-SWT). Through sub band coding in DWT the signal is decomposed into lower sub bands of high and low frequency respectively of unequal size; while in SWT the decomposed signal have sub bands of equal size. In DWT-SWT the high frequency components of both DWT and SWT are added. Using Pulse Position Modulation, the comparison between these three techniques is described here to enhance the overall performance of the IOWC system.

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