EVALUATION NOISE IMMUNITY OF THE BINARY DIGITAL MODEM WITH SIGNALS TYPE NOISE USING THE CHARACTERISTIC FUNCTION METHOD

2019 ◽  
Author(s):  
S. Pervuninsky ◽  
V. Oleksjuk
Keyword(s):  
Noise Immunity ◽  
System Development ◽  
Random Variable ◽  
Noise Signal ◽  
Design Stage ◽  
Characteristic Functions ◽  
Mathematical Apparatus ◽  
Theoretical Evaluation ◽  
Digital Correlator ◽  
Digital Modem

The issue of improving modems with noise signals implies increasing the accuracy of theoretical estimation of noise immunity of the proposed methods of demodulation of information components of signals. Important is the task of assessing the immunity of digital modems, enabling engineers to ascertain the prospect of system development at the design stage. The article investigates the noise immunity of a binary digital modem with phase manipulation of the noise signal and the autocorrelation algorithm of its reception, which uses as noise carrier Gaussian signals. The paper presents a technique for calculating the bit error rate (BER) in a demodulator, which is characterized by the fact that the functional for estimating the received information bit contains components with different laws of probability distribution. The presented methodology is based on a mathematical apparatus of characte­ristic functions, which allows determining the potential noise immunity of a digital modem, providing a reduction of the discrepancies between theoretical and experimental data for determining the BER. Summing up the whole research it is worth noting the following research results: 1 noise immunity analysis of digital binary modem of noise signals was performed using mathematical apparatus of characteristic functions at autocorrelation method of operation of Gaussian type noise signal demodulator in the presence of Gaussian additive interference; 2 an analytical expression was found to calculate the characteristic density function of the random variable distribution at the output of a binary digital correlator; 3 the ratio was obtained to determine the potential noise immunity of the demodulator. The results of the study showed that the application of this technique eli­minates significant differences between the results of the theoretical evaluation of the noise immunity of the demodulator and the results of its simulation.

On the Distribution of Sum of Independent Positive Binomial Variables

1970 ◽  
Vol 13 (1) ◽  
pp. 151-152 ◽  
Author(s):  
J. C. Ahuja
Keyword(s):  
Power Series ◽  
Inversion Formula ◽  
Probability Function ◽  
Random Variables ◽  
Random Variable ◽  
Characteristic Functions ◽  
Binomial Probability ◽  
Generalized Power Series ◽  
Alternative Derivation ◽  
Image Position

Let X1, X2, …, Xn be n independent and identically distributed random variables having the positive binomial probability function1where 0 < p < 1, and T = {1, 2, …, N}. Define their sum as Y=X1 + X2 + … +Xn. The distribution of the random variable Y has been obtained by Malik [2] using the inversion formula for characteristic functions. It appears that his result needs some correction. The purpose of this note is to give an alternative derivation of the distribution of Y by applying one of the results, established by Patil [3], for the generalized power series distribution.

The Quality Mode Control of New Air Conditioning Product-Service Systemdevelopment and its Application

2012 ◽  
Vol 246-247 ◽  
pp. 924-928
Author(s):  
Hai Tian ◽  
Yi Yang ◽  
Rui Miao ◽  
Shen Wang
Keyword(s):  
Quality Control ◽  
Air Conditioning ◽  
Manufacturing Industry ◽  
System Development ◽  
Control Mode ◽  
Design Stage ◽  
Control Methods ◽  
Product Service ◽  
Internal Relationship ◽  
Product Service Systems

Based on the methodology and tools of quality control mode, this paper mainly focuses on six stage divisions of a new air conditioning product-service system development, such as concept stage, plan stage and design stage etc. It introduces with an example the application of quality control methods of each stage of this mode, and points out that the quality control methods have internal relationship and they should be organic combined to use to form a system.It not only shows that quality control mode is very effective concept and methodology in manufacturing industry, but also can be learned lesson from for more and more product-service systems to improve the quality control and product quality.

THE ASYMPTOTIC BEHAVIOR OF SEMI-INVARIANTS FOR LINEAR STOCHASTIC SYSTEMS

2002 ◽  
Vol 02 (02) ◽  
pp. 281-294
Author(s):  
G. N. MILSTEIN
Keyword(s):  
Asymptotic Behavior ◽  
Lyapunov Exponent ◽  
Linear System ◽  
Characteristic Function ◽  
Stochastic Systems ◽  
Random Variable ◽  
Characteristic Functions ◽  
Linear Stochastic Systems ◽  
Moment Lyapunov Exponent ◽  
The Moment

The asymptotic behavior of semi-invariants of the random variable ln |X(t,x)|, where X(t,x) is a solution of a linear system of stochastic differential equations, is connected with the moment Lyapunov exponent g(p). Namely, it is obtained that the nth semi-invariant is asymptotically proportional to the time t with the coefficient of proportionality g(n)(0). The proof is based on the concept of analytic characteristic functions. It is also shown that the asymptotic behavior of the analytic characteristic function of ln |X(t,x)| in a neighborhood of the origin of the complex plane is controlled by the extension g(iz) of g(p).

scholarly journals A Note on Characteristic Functions Which Vanish Identically in an Interval

1962 ◽  
Vol 58 (2) ◽  
pp. 430-432 ◽  
Author(s):  
Walter L. Smith
Keyword(s):  
Characteristic Function ◽  
Random Variable ◽  
Characteristic Functions ◽  
Unpublished Work

Some years ago, in connexion with some unpublished work in the theory of queues, the question arose as to whether the characteristic function of a non-negative random variable could vanish identically in an interval. The purpose of this note is to show that such a thing is impossible.

scholarly journals Analisis dan Pengembangan Sistem Informasi Penjualan BBM Berbasis Android

2021 ◽  
Vol 3 (2) ◽  
pp. 164-171
Author(s):  
Rohmad Abidin ◽  
Taufik Kurnialensya
Keyword(s):  
Information System ◽  
System Development ◽  
Fuel Oil ◽  
Design Stage ◽  
Prototype Model ◽  
Report Generation ◽  
Tablet Devices ◽  
Sales Data ◽  
Testing Stage ◽  
Identification Stage

In managing reports on sales of fuel oil (BBM) at gas stations xxx Semarang using reports in the form of paper. The sales report paper is then recapitulated by the Administrative Officer. When going to perform data processing, the officer finds it difficult to present the sales data requested by the Manager. To overcome the problems that exist in the manual system, it is necessary to create a BBM Sales Information System so that data management and report generation can be done better. This research focuses on sales data for each type of fuel. To illustrate the requirements of the system using a use case diagram. The information system that will be created is built for the Android operating system that runs on tablet devices to make it easier for operators to fill in fuel sales data. The database used is SQLite because it is one of the databases that support mobile devices. The new system development method uses a prototype model. The stages used in the development of this system include the needs identification stage, the design stage, the prototyping manufacturing stage, the testing stage, and the implementation stage. The results of the development show that the Gas Station Sales Recording Application can run well because it is according to the manager's needs.

scholarly journals Process of analysis and design of income accounting information system (case study of PT. MARCI)

2021 ◽  
Vol 6 (1) ◽  
pp. 51
Author(s):  
Rizki Ahmad Fauzi ◽  
Darwin Marasi Purba
Keyword(s):  
Information System ◽  
System Design ◽  
System Analysis ◽  
System Development ◽  
Accounting Information ◽  
Process Efficiency ◽  
Design Stage ◽  
Accounting Information System ◽  
Analysis And Design ◽  
Income Accounting

Abstract: To increase the competitiveness of a company requires information, including accounting information. With a good accounting information system, it is hoped that the results of physical process efficiency, data updates and accuracy will be achieved. The system design methodology in making the system goes through the stages (1) System Survey (2) System Analysis (3) System Design (4) System Development (5) Testing (6) System Implementation (7) System maintenance. However, with limited time and funds, the researcher completed the research to the system design stage in the form of standard operating procedures (SOP). As for the conclusion, it was found that the work was still inconsistent (same work but implemented in different ways), recording errors, process delays and poor quality.The system design model that has been prepared by the researcher for the Income Accounting Information System of PT Marci consists of the following procedures: (1) order receipt (2) contract agreement (3) work process (4) billing (5) recording. Keywords: System design, accounting information system, PT MARCI 

scholarly journals Guidance and Counseling Record Management System

2021 ◽  
Vol 10 (3) ◽  
pp. 2138-2144
Keyword(s):  
Management System ◽  
System Development ◽  
Personal Information ◽  
Design Stage ◽  
Easy Access ◽  
Record Management ◽  
Guidance And Counseling ◽  
Planning Stage ◽  
Software Application ◽  
Testing Stage

The developed Record Management System for Guidance and Counseling Center of the Nueva Ecija University of Science and Technology aimed to provide software application that will manage the recordof student and provides fast and easy access of personal information of students. The functions focused in adding and updating students’ information/profile by using the application. The user can produce a printed copy of the record of student. The development of the Record Management System underwent the phases for System Development Life Cycle (SDLC) such as: Stage 1 –Planning; Stage 2 –Analysis; Stage 3 –Design; Stage 4 –Coding; Stage 5 –Testing; Stage 6-Implementation; and Stage 7 –Maintenance.The system took three months to be developed was accomplished using Visual Basic 2017 programming language and Microsoft SQl Server 2017 database. Record Management Systemhas been strongly accepted by the respondents based on their assessment on these five criteria: functionality, usability, efficiency, portability,and security. The suggestions given by the group of respondents may be considered for future enhancement of the system.

scholarly journals On a transformation of the weighted compound Poisson process

1971 ◽  
Vol 6 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Hans Bühlmann ◽  
Roberto Buzzi
Keyword(s):  
Poisson Process ◽  
Compound Poisson Process ◽  
Random Variable ◽  
Characteristic Functions ◽  
Compound Poisson ◽  
Common Distribution ◽  
Common Distribution Function ◽  
Poisson Variable ◽  
Image Position ◽  
Independent Identically Distributed

We are using the following terminology—essentially following Feller:a) Compound Poisson VariableThis is a random variable where X1, X2, … Xn, … independent, identically distributed (X0 = o) and N a Poisson counting variablehence(common) distribution function of the Xj with j ≠ 0 or in the language of characteristic functionsb) Weighted Compound Poisson VariableThis is a random variable Z obtained from a class of Compound Poisson Variables by weighting over λ with a weight function S(λ)henceor in the language of characteristic functionsLet [Z(t); t ≥ o] be a homogeneous Weighted Compound Poisson Process. The characteristic function at the time epoch t reads thenIt is most remarkable that in many instances φt(u) can be represented as a (non weighted) Compound Poisson Variable. Our main result is given as a theorem.

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